Thursday, March 21, 2019

Marguerite Stitt Church, Congresswoman.

After years of assisting the political career of her husband, Ralph Church, and working for various charities, Marguerite Stitt Church won election to the House of Representatives to succeed Congressman Church after his death in 1950. Congresswoman Church sought and gained a seat on the Foreign Affairs Committee, traveling to more than 40 countries and seeing firsthand how U.S. foreign aid was employed in them.
Marguerite Stitt was born in New York City on September 13, 1892, the daughter of William and Adelaide Stitt. She developed an interest in foreign countries at an early age when her parents took her abroad each summer as a child. She attended St. Agatha School in New York City and, later, as a member of Phi Beta Kappa, earned an A.B. in psychology with a minor in economics and sociology from Wellesley College in 1914. After graduation, she taught a biblical history course at Wellesley for a year before enrolling in a masters program in economics and sociology at Columbia University. She completed her graduate degree in 1917 and worked for a year as a consulting psychologist with the State Charities Aid Association of New York City. 

In 1918, she traveled to Chicago and met Illinois state legislator Ralph Church. The couple married that December and settled in Evanston, Illinois, where they raised three children: Ralph, William, and Marjory. Marguerite Church worked in a succession of organizations devoted to family and children’s welfare. In 1934, Ralph Church was elected to the U.S. House of Representatives to the first of seven terms in a seat representing the densely populated suburbs just north of Chicago. Marguerite embarked with him on investigative trips, making her own speaking tour on behalf of Republican presidential campaigns in 1940 and 1944. During and after World War II, at her husband’s request, she made several inspection tours of Europe. In Washington she served as president of the Congressional Club, a group of wives and daughters of Members of Congress, the Cabinet, and the Supreme Court. But she later recalled that while he was alive she never seriously considered a political career. “My political life was one of adaptation to his life,” Church observed. Nevertheless, her experience as a congressional spouse was critical to her later success, making her “a realist as regards the practical operation of Congress.”

Ralph Church died suddenly of heart failure during a House committee hearing in March 1950. Shortly thereafter, GOP leaders in Illinois persuaded Marguerite Church to run for her husband’s vacant seat. “If a man had been nominated and made a mistake, you would have said he is stupid,” Church said at the time. “If I make a mistake, you will say she is a woman. I shall try never to give you reason to say that.” In the general election that fall, she defeated Democrat Thomas F. Dolan with 74 percent of the vote. In her next five re–election bids, she was never seriously challenged, winning between 66 and 72 percent of the vote. “The [local GOP] organization, of course, never considered anybody else after I got in,” Church recalled. “They just went along.” Much of her success was due to her attention to district needs. She returned to Illinois frequently, opened her home to voters, and personally dictated replies to an average of 600 letters per week. Her cardinal rule was if anyone came asking for help, “never let yourself ask, ‘Is he a Republican or a Democrat?’…We never made any political distinction whatsoever, and I think that was one reason that in the long run people began to trust me.” Church’s independence also earned her the respect of colleagues.

When Church took her seat in the 82nd Congress (1951–1953), she was assigned to the Committee on Expenditures in Executive Departments (later Government Operations), where she chaired a special subcommittee investigating President Dwight Eisenhower’s reorganization of the Council of Economic Advisers. Church was instrumental in helping to pass recommendations offered by the Second Hoover Commission on efficiency in government. In 1957, Church supported the Civil Rights Bill. She also was one of the first Members to bring African–American guests into the House dining room, when she treated six young newsboys to lunch. Capitol staff told her she would never get through the door. “Well,” she replied, the boys have worked hard selling newspapers “and I certainly do not intend to tell them they can’t luncheon in the dining room of their own Capitol.” The group ate lunch in the dining room. Though not “militant about a woman’s rights,” Church supported women’s rights legislation, including the Equal Pay Bill. She encouraged women entering politics to think of themselves as public servants rather than advocates of feminism. She believed in “equal protection under the law for both men and women, period.”

Church left Government Operations in the 84th Congress (1955–1957) to focus exclusively on her Foreign Affairs Committee assignment (which she had received two years earlier). After winning re–election in 1952, she had been offered a spot on the prestigious Appropriations Committee, where her husband once sat and, in fact, where only one woman had previously served. The committee chairman made the offer, but Church declined. “I’m awfully sorry,” she replied. “I’ve spent all summer trying to persuade people that it would be a loss to the country if they didn’t put me on the Foreign Affairs Committee. That has become my major interest.” She later claimed that she did not want to accept an assignment that, she believed, was made partly as a tribute to her husband. She served on Foreign Affairs until she retired from Congress.

Church’s chief interests and influence flowed from her work on the Foreign Affairs Committee, where she was assigned to the Subcommittee on Foreign Economic Policy. She was a skeptic of large foreign–aid bills appropriated for many of America’s Cold War allies in Asia, the Middle East, and Africa. “The idea that you can win friends and influence people merely by pouring out millions—and it’s amounted by this time to billions—never caught my attention or my faith,” she recalled. As a member of the Subcommittee on the Far East and the Pacific, she traveled widely to witness firsthand the implementation of American programs. “Some officials protested that this was no place for a lady,” Church told a reporter. “I told them I was not a lady. I was a Member of Congress.” In 1959, while Ranking Republican Member on the Foreign Economic Policy Subcommittee, she logged more than 40,000 miles in 17 countries. Her experience with a group of tribal women in a remote sub–Saharan African village shaped her view of how foreign aid should be targeted. “These women, I found, didn’t want guns; they didn’t want atomic plants; they didn’t want navies,” Church said. “They wanted someone who could show them the next step up from where they were to where they’d like to be.”

During the first year of the John F. Kennedy administration, that memory factored into her championing of the Peace Corps, which sought to provide educational and technological support to developing countries through the work of trained college–aged American volunteers. During a September 14, 1961, debate, seven–term Representative H.R. Gross of Iowa launched a verbal diatribe against the Peace Corps program. Gross described it as a “Kiddie Korps,” reminiscent of Hitler’s youth corps in Nazi Germany, and a “utopian brainstorm” that would exacerbate the U.S. deficit. In response, Congresswoman Church entered the well of the House to speak on behalf of the program, recounting her numerous trips abroad where she had seen foreign–aid dollars misspent and misdirected in the battle for the developing world. “Here is something which is aimed right,” Church told colleagues, “which is American, which is sacrificial—and which above all can somehow carry at the human level, to the people of the world, what they need to know; what it is to be free; what it is to have a next step and be able to take it; what it is to have something to look forward to, in an increase of human dignity and confidence.” A GOP colleague recalled that Church’s floor speech was critical in persuading a number of reluctant Republicans to support the measure. “You quite literally could see people who had been uncertain or perhaps who had already decided to vote against the Peace Corps sit there, listen to her very quietly and start to rethink,” Representative Catherine May of Washington State said.” Later that afternoon, the Peace Corps legislation passed the House by a wide margin, 288 to 97.

In 1962, as an advocate of mandatory retirement for Members of Congress and facing reapportionment in her district, Church set her own example by retiring at age 70 after the close of the 87th Congress (1961–1963) in January 1963. She worked on behalf of the Republican presidential campaigns of Barry Goldwater in 1964 and Richard M. Nixon in 1968. She later served on the boards of directors for the Girl Scouts of America and the U.S. Capitol Historical Society. In 1971, President Nixon selected Church to serve on the planning board for the White House Conference on Aging. 

Marguerite Church resided in Evanston, Illinois, where she died on May 26, 1990 at 97 years old.

By History, Art & Archives
Editor; Neil Gale, Ph.D. 

Friday, March 15, 2019

The History of Illinois Training School for Nurses at Cook County Hospital in Chicago.

The Illinois Training School for Nurses (ITSN) was established on September 21, 1880, by a group of prominent Chicago women dedicated to training young women to care scientifically for the sick.
The old Cook County Hospital. The original building was when the school entered on May 1, 1881, and the administration building (center) was finished in 1882.
Twenty-five directors, all female, headed the project. Prominent among these were Sarah L. Wright, Dr. Sarah Hackett Stevenson, Margaret Lawrence, Lucy L. Flower, and Elizabeth B. Carpenter.
Illinois Training School for Nurses - Nurses Home.
Considerable political opposition to the plan was based on the belief that modest young women of good moral character were not suited for a profession that required a rigorous education, long hours of work, and intimate contact with strangers. However, on November 13, 1880, the Chicago Medical Society passed a resolution affirming its support for ITSN. On December 1, the Cook County Commissioners and the Training School agreed that the County would pay the school to provide trained instructors and student nurses to staff one medical and one surgical ward of the Cook County Hospital.
Illinois Training School for Nurses student's room.
Illinois Training School for Nurses student's room.
On May 1, 1881, the first pupil nurses began working in the wards, replacing untrained male nurses who had held their positions through political appointments. Later that year, the school began providing nurses for the lying-in ward [1]. Other wards followed shortly: in 1882, all remaining female and medical wards; in 1883, the surgical wards; in 1893, the contagious disease hospital; in 1897, the skin and venereal wards. Eventually, ITSN provided nursing services for every ward of Cook County Hospital. Working so closely with one of the world's largest public hospitals, the Illinois Training School for Nurses attracted many prominent pioneers in nursing education. Superintendents of ITSN included Mary Brown and Edith Draper from New York's Bellevue Training School, Mary C. Wheeler, an early ITSN graduate, and Laura Logan, who helped establish the University of Cincinnati School of Nursing. Under the leadership of women like these, ITSN gradually added many special programs and pioneering innovations to its curriculum, including private nursing, a visiting nurse service, post-graduate and dietician programs, and affiliation with other nursing schools.
First graduates from the Illinois Training School for Nurses; Spring & Fall of 1883.
1) Sophie Falk, 2) Melissa J. Bartles, 3) Angie Bean, 4) Phebe Brown,
5) Anna Steere 6) Helen Nutting 7) Janet Topping
Private nursing was begun in April 1883 as a service to the sick outside the hospital. Trained student nurses were dispatched to work full-time in private homes, thus filling a genuine need within the community while raising additional funds for the school.

Crerar nursing, begun in the fall of 1892 through a bequest of John Crerar, was a critical service in the years before the widespread activities of the Visiting Nurses Association. Crerar nurses, who were ITSN students, provided nursing care in the homes of low-income families who paid a minimal fee to the school. In this way, ITSN could provide community service as it trained students. Private nursing and Crerar nursing were necessary public relations measures that helped create public support for a school that increasingly depended on contributions and bequests to purchase buildings and expand services and training.
Illinois Training School for Nurses - Nursery
In May of 1885, ITSN agreed to provide nurses for the Presbyterian Hospital. This service was interrupted in November for financial reasons but was resumed in 1888. It continued for fifteen years until 1903, when the increasing size of both Presbyterian and Cook County Hospitals made it impossible for ITSN to staff both facilities.

In 1895, ITSN began admitting a few post-graduate nurses. In 1920 a post-graduate course for dieticians was established, for which a college degree was a pre-requisite.
Medical staff, including Dr. F.A. Besley holding infants at the Illinois Training School for Nurses.
The affiliation began in 1905. This program allowed students from smaller schools to spend their final year of training at ITSN, working in the wards of Cook County Hospital and gaining a breadth of experience unavailable in smaller hospitals. Dixon Hospital, Brokaw Hospital of Bloomington, Passavant of Chicago, and Moline Hospital were some of the early participants in the program.

With its many unique programs and innovations in nursing education, ITSN was long interested in improving education for nurses and elevating their professional status. The quality of education at ITSN was consistently upgraded over the years through the addition of more required medical and scientific coursework, a greater breadth of practical experience in the hospital wards, and an increase in the length of time necessary to receive the nursing certificate, from 24 months to 36 months.

Illinois Training School for Nurses
Graduation Pin
In 1926, after much exploration of the issue, ITSN agreed to merge its corporate identity with the University of Chicago (U of C). In return, U of C would later establish a nursing school to award its graduates a Bachelor of Science degree. ITSN continued to operate independently until 1929 when the merger took effect, and ITSN ceased to exist. All ITSN property and assets reverted to the University of Chicago, and ITSN contracts with the Cook County Commissioners were terminated.

The County Commissioners, who had relied almost entirely upon ITSN nurses to staff the Cook County Hospital, established its own training school to perform the same function. The County rented the former ITSN facilities from their new owner, the University of Chicago, hired the former ITSN faculty to staff the school, and allowed ITSN students to transfer with full credit to the Cook County School of Nursing (CCSN). Although CCSN was a continuation of ITSN, the Illinois Training School ceased to exist as a corporate identity upon its legal merger with the University of Chicago. The name of the Illinois Training School for Nurses was to be perpetuated in a scholarship fund for the University of Chicago's School of Nursing.

Compiled by Dr. Neil Gale, Ph.D.



[1] Lying-in (or confinement) is an old childbirth practice involving a woman having bed rest postpartum after giving birth.

ADDITIONAL READING
"History of the Illinois Training School for Nurses, 1880-1929." Published 1930.
In my Digital Research Library of Illinois History®

Anna Pierce Hobbs Bixby (1812–1873) was a midwife, frontier doctor, dentist, herbologist, and scientist in southern Illinois.

Anna Bixby
Anna Pierce was the daughter of farmers who had moved from Philadelphia and, in 1828, settled in southeastern Illinois, close to Rock Creek's village. After finishing school, Anna traveled to Philadelphia to train in midwifery and dentistry. Still, she became the first physician in Hardin County and, consequently, a general practitioner for her community on her return to Illinois. 

Anna Bixby may also have been the first female doctor in Illinois; others claimed she was a midwife from Tennessee. She married her first husband, Isaac Hobbs.

She researched milk sickness, causing a good deal of fatality among both people and calves, including Anna's mother and sister. Noting the seasonal nature of the disease and the fact that sheep and goat milk were not affected, she reasoned that the cause must be a poisonous herb. 
Dr. Anna Pierce Hobbs Bixby discovered that White Snakeroot (Ageratina altissima) and Milkweed (Asclepias) were the cause of milk sickness from grazing cows eating the wild plants, which fatally poisoned the milk consumed by frontier settlers.

 
However, she could not determine the precise cause when she met an elderly Indian woman in the woods whom the local people called "Aunt Shawnee." 

Shawnee." She was a herbalist and healer and showed Anna a plant, White Snakeroot (Ageratina altissima), and "Milkweed," which had caused the same symptoms as the milk sickness did in her own tribe. The plant had killed many Shawnee cattle, and she told Anna it was probably what she was looking for.

Experiments on a calf confirmed the toxic effect of 
White Snakeroot and Milkweed. When cattle consume the plant, their meat and milk become contaminated and cause the sometimes fatal condition of milk sickness. The milking cows did not fall ill, but the other cattle and those who drank their milk fell victim to the toxin.

One of the most notable and tragic cases of the "milk sickness" was Abraham Lincoln's mother, Nancy Hanks Lincoln, who died at 34 years old in 1818. As hard as Bixby worked, she could not stop the scourge. When Louis Pasteur discovered pasteurization [1] in 1856, non-toxic milk began.

The plague was finally wiped out. However, despite Bixby's efforts, it was not until 1928 (55 years after her death) that research confirming her discovery was published. Her position as a frontier doctor and a woman would have made it hard for her to gain the respect of the medical profession of the time. 

After Isaac Hobbs died, Anna Pierce Hobbs married her second husband, Eson Bixby, who became a notorious outlaw around Cave-In-Rock on the Ohio River.

Anna Hobbs Bixby died in Rock Creek, Hardin County, Illinois, in 1873.

THE LEGEND OF ANNA BIXBY: 
Ghosts & Buried Treasure
According to local legend, Anna Bixby left a treasure trove concealed in a cave named after her. The treasure is supposedly buried in Rock Creek, Hardin County, Illinois, and has never been found. 
Cave-in-Rock, Illinois.


The following significant incident in Anna's life, during her second marriage to Eson Bixby, is believed to be involved in several criminal enterprises. The legend does have some elements of truth, which originated in the book "The Ballads of the Bluff" by Judge W.M. Hall, who allegedly had a diary that belonged to Anna Bixby. Historians have since disputed much of the story, although it was believed that Hall was simply passing along reports that he had heard. Here is the basic version of the story:
Legend holds that John Murrell and his gang, along with James Ford and other disreputable characters, distilled whiskey and made counterfeit money (coiners) in Cave-in-Rock in Hardin County that has since become known as Bixby’s Cave. Enos Bixby, Anna’s husband, took over after these men were driven out or killed and continued their operations, along with committing robberies (river pirates) and stealing timber. Bixby married Anna when she was an old woman because he hoped to steal her money from her. Finally, he attempted to kill her by tying her up with ropes and heavy chain and pushing her off a bluff. As it happened though, she fell into a tree and managed to escape. Not long after, Anna died suddenly and she was buried with the rope and chain that her husband tried to kill her with. Her ghost has haunted her burial site ever since, often appearing as a shimmering light.
But, despite the tale's popularity, it only contains elements of the truth. The period when all of this allegedly occurred is the biggest problem with the story. Bixby's cave did (and does still) exist. However, after 1811, it needed to be bigger to house a moonshine distillery and, indeed, a counterfeiting operation. The cave was heavily damaged in the 1811 earthquake that rocked the New Madrid Fault and afterward was much less accessible than before. Several of the men involved in the story's criminal aspects were dead long before Anna married Eson Bixby, and others who allegedly worked together were children during the time of the opposite criminal's heyday. If the story had involved these men, it would have happened in the 1820s. This seems odd since Anna's first husband died in 1845, and Anna survived until 1873. 

On the other hand, recent historians believe that the story may have occurred in some fashion, but it was told and re-told using well-known outlaws as the key players in the tale when the real culprits may have been much lesser known. Counterfeiters (coiners) were operating in Hardin County at the time, and it has been learned that Anna's second husband was involved with criminals. 
Counterfeiters used a coin die to make counterfeit coins from cheap metals or restamping Mexican coin denominations.
In 1935, the Hardin County Independent newspaper published what was likely a more accurate account of Anna's escape from her murderous husband. The writer of the account, Charles L. Foster, had left Hardin County in the 1880s but had grown up in the Rock Creek area, a few homes away from Anna Bixby. He was born in 1863 and vaguely remembered Eson Bixby when he was alive, which dates the escape to the late 1860s, in the years following the Civil War. 

According to the account, a rider came to the Bixby household late during a terrible thunderstorm. He called out to the house that someone needed Anna's medical skills, and she immediately came out. She mounted the rider's second horse, and they rode into the woods. Thanks to the heavy storm clouds overhead, the trail was shrouded in darkness, and Anna soon became disoriented and unsure of their route. However, at one point during the ride, she looked over. When a flash of lightning illuminated the night, Anna saw the identity of the mysterious rider — it was her husband, Eson.

When he realized that she had discovered his identity, Bixby brought the horses to a halt, and he quickly bound her hands and gagged her. Evidently, he intended to do away with her, and Anna panicked. When she heard the jingle of chains being removed from his saddlebags, Anna became so frightened that she began to run, dashing into the dark woods. As she plunged into the forest, her fear became even more vital as she realized she had no idea where she was. The storm continued to rage, sending rain lashing down on her and causing the wind to whip through the trees in a wild fury. Anna ran for some distance, and then suddenly, the ground beneath her vanished, and she tumbled over a large bluff and crashed to the ground far below. The fall broke the ropes that bound her hands and broke some of her bones, seriously injuring her. Nevertheless, she crawled a short distance to a fallen tree and slithered behind it.

A few moments later, a light appeared in the darkness at the top of the bluff, and Eson Bixby came into view carrying a burning torch. He climbed down from the top of the rocks and searched for Anna, but he did not find her. After a few minutes, he returned to his horse and rode away. 

Once he was gone, Anna began crawling and stumbling out of the forest. It took her until sunrise to find a nearby farmhouse, but when she reached it, she found herself at a friend's doorstep — only a few houses away from her own. They quickly took her in, and she told them what had happened.

Bixby was soon arrested and taken to jail in Elizabethtown. He escaped through and vanished for a time. He was later captured again in Missouri, but once again, he ran. This time, he disappeared for good and was never seen again.

Anna lived in the Rock Creek community of Hardin County until 1873; when she died, she was buried next to her first husband, and only a simple "A" was inscribed on her headstone. But some believe that Anna, or at least her spirit, lives on.

The legend of Anna Bixby states that her husband wanted to do away with her because of a fortune that she had amassed over the years. What may have amounted to a "fortune" in those days may have been much smaller than what we would consider a fortune today, but most believe it was a large amount of money. The legend further states that when Anna learned of Eson's greed, she hid the money somewhere just before he attempted to do away with her. It is believed that the hiding place for the treasure was the cave beside Rock Creek in Hooven Hollow, which was also said to have been the hiding place of outlaw gangs. 

The cave is still known as Anna Bixby Cave today. Over the years, people have reported seeing a strange light appear along the bluff in the cave's vicinity. The significant, glowing light moves in and out of the trees and among the rocks, vanishing and reappearing without explanation. It is believed that the light may be that of Anna Bixby, still watching over the treasure that she hid away years ago.

Folklorist Charles Neely collected one of the most detailed accounts of the Bixby ghost light in his 1938 book Tales & Songs of Southern Illinois. The story of the spook light was told by Reverend E.N. Hall, a minister who once served the Rock Creek Church and had several brushes with the uncanny in this part of Hardin County. One evening in his younger days, Hall and a friend named Hobbs walked over to a nearby farm to escort two girls to church. When they got to the house, they found no one home. It appeared that the girls left without them, and the two young men stood around for a few moments, wondering what to do. 

They stood at the edge of the yard as they talked and looked toward the darkened house. The house stood on a short knoll with a hollow that ran away from the gate to the left for about 100 yards and then joined with another hollow that came back to the right side of the gate. Hobbs was looking eastward along the bluff when he saw what appeared to be a "ball of fire about the size of a washtub" going very fast along the east hollow.

At first, the young men thought that it might be someone on a horse carrying a lantern, then realized that it was moving much too fast for that. The light followed the hollow to the left of the gate along a slight curve where one cavity met the other. It followed the opposite hollow and came right up the bank where the two men were standing. It paused, motionless, about 30 feet away from them, and began to burn down smaller and smaller and then turned red as it went out. Finally, it simply vanished.

The two young men decided not to go to church. They went directly to the farm where they had been working and went to bed. The next morning, at the breakfast table, they told Mr. Patten, the farmer they had been working for, what they had both seen the night before. He laughed at them and said it had just been a "mineral light" carried by the wind. He had no explanation, though, for how fast the light had moved or that there had been no wind the previous evening. He could also not explain why the light seemed to follow the two hollows and then stop in place and burn out.

Later, Hall had the chance to speak with the woman who owned the farm, Mrs. Walton, and asked her what the light might have been. She then told him the story of Anna Bixby, who had owned the property before she had, and explained that to protect her money from her criminal husband, she had hidden her fortune in a cave that was located on the property. Mrs. Walton always believed that the spook light was the ghost of Anna Bixby, checking to see that her money was still hidden away. She had seen the light herself on many occasions, always disappearing into the cave.

If she knew so well where Anna's money was hidden, Hall asked her why she had never bothered to go and get it. "I would," Mrs. Walton answered, "if I thought that Granny Bixby wanted me to have it."

A historical marker has been mounted in Anna Bixby's honor at Cave-in-Rock, Illinois, near her home. In southern Illinois, the Anna Bixby Women's Center in Harrisburg, Illinois, provides shelter and services to abused women and children.

Compiled by Dr. Neil Gale, Ph.D.



[1] Pasteurized vs. Homogenized

PASTEURIZATION
Louis Pasteur discovered pasteurization in 1856 when an alcohol manufacturer commissioned him to determine what was causing beetroot alcohol to sour. Pasteurization does not kill all microorganisms in milk but is intended to kill some bacteria and make some enzymes inactive. 


But who first suggested that milk be pasteurized to make it safer for consumption? 

It was Frans von Soxhlet, a German agricultural chemist. He was the first person to suggest that milk sold to the public be pasteurized in 1886. 

The term "pasteurization" is derived from Louis Pasteur's pioneering work on the destruction of microbes through heat treatment, but Pasteur's area of interest was wine and beer, not milk. Pasteur didn't even invent pasteurization. Heat treatment that made foods safer was known long before Pasteur, but the French chemist was the first to explain the phenomenon. Pasteur realized that spoilage was due to chemical reactions initiated by living microbes, and heat treatment prevented spoilage because of its destructive effect on these living organisms. If wine or beer turned sour, Pasteur maintained, it was because of contamination by acid-producing rogue yeasts after the alcohol-producing yeast had done its job. The heating of wine would then destroy these invaders and preserve the beverage.

Milk presented an altogether different scenario from wine. Typhoid and scarlet fever, diphtheria, tuberculosis, and various diarrheal diseases were transmitted through milk consumption. The pasteurization process kills those microbes like what's found in White Snakeroot and Milkweed.

How is milk pasteurized? Chilled raw milk is heated by passing it between heated stainless steel plates until it reaches 161° F, and it's then held at that temperature for at least 15 seconds before it's quickly cooled back to its original temperature of 39° F.

HOMOGENIZATION
Homogenization is an entirely separate process that occurs after pasteurization in most cases. The purpose of homogenization is to break down fat molecules in milk so that they resist separation. Without homogenization, fat molecules in milk will rise to the top and form a layer of cream. Homogenizing milk prevents this separation by breaking the molecules down to such a small size that they remain suspended evenly throughout the milk instead of rising to the top.

The homogenization process was invented and patented by Auguste Gaulin in 1899 when he described a method for homogenizing milk. Gaulin's machine, a three-piston thruster outfitted with tiny filtration tubes, was shown at the World Fair in Paris in 1900.
Homogenization is a mechanical process and doesn't involve any additives. Like pasteurization, arguments exist for and against it. It's advantageous for large-scale dairy farms to homogenize milk because it allows them to mix milk from different herds without issue. By preventing cream from rising to the top, homogenization also leads to a longer shelf life of milk, which will be most attractive to consumers who favor milk without the cream layer. This allows large farms to ship greater distances and do business with more retailers. Finally, homogenization makes it easier for dairies to filtrate out the fat and create two percent, one percent and skim milk.