Why Some Civil War Soldiers Glowed in the Dark

By the spring of 1862, a year into the American Civil War, Major General Ulysses S. Grant had pushed deep into Confederate territory along the Tennessee River. In early April, he was camped at Pittsburg Landing, near Shiloh, Tennessee, waiting for Maj. Gen. Don Carlos Buell’s army to meet up with him.

On the morning of April 6, Confederate troops based out of nearby Corinth, Mississippi, launched a surprise offensive against Grant’s troops, hoping to defeat them before the second army arrived. Grant’s men, augmented by the first arrivals from the Ohio, managed to hold some ground, though, and establish a battle line anchored with artillery. Fighting continued until after dark, and by the next morning, the full force of the Ohio had arrived and the Union outnumbered the Confederates by more than 10,000.

The Union troops began forcing the Confederates back, and while a counterattack stopped their advance it did not break their line. Eventually, the Southern commanders realized they could not win and fell back to Corinth until another offensive in August (for a more detailed explanation of the battle, see this animated history).

All told, the fighting at the Battle of Shiloh left more than 16,000 soldiers wounded and more 3,000 dead, and neither federal or Confederate medics were prepared for the carnage.

The bullet and bayonet wounds were bad enough on their own, but soldiers of the era were also prone to infections. Wounds contaminated by shrapnel or dirt became warm, moist refuges for bacteria, which could feast on a buffet of damaged tissue. After months marching and eating field rations on the battlefront, many soldiers’ immune systems were weakened and couldn’t fight off infection on their own. Even the army doctors couldn’t do much; microorganisms weren’t well understood and the germ theory of disease and antibiotics were still a few years away. Many soldiers died from infections that modern medicine would be able to nip in the bud.

A Bright Spot

Some of the Shiloh soldiers sat in the mud for two rainy days and nights waiting for the medics to get around to them. As dusk fell the first night, some of them noticed something very strange: their wounds were glowing, casting a faint light into the darkness of the battlefield. Even stranger, when the troops were eventually moved to field hospitals, those whose wounds glowed had a better survival rate and had their wounds heal more quickly and cleanly than their unilluminated brothers-in-arms. The seemingly protective effect of the mysterious light earned it the nickname “Angel’s Glow.”

In 2001, almost one hundred and forty years after the battle, seventeen-year-old Bill Martin was visiting the Shiloh battlefield with his family. When he heard about the glowing wounds, he asked his mom - a microbiologist at the USDA Agricultural Research Service who had studied luminescent bacteria that lived in soil - about it.

“So you know, he comes home and, 'Mom, you're working with a glowing bacteria. Could that have caused the glowing wounds?’” Martin told Science Netlinks. “And so, being a scientist, of course I said, ‘Well, you can do an experiment to find out.’”

And that’s just what Bill did.

He and his friend, Jon Curtis, did some research on both the bacteria and the conditions during the Battle of Shiloh. They learned that Photorhabdus luminescens, the bacteria that Bill’s mom studied and the one he thought might have something to do with the glowing wounds, live in the guts of parasitic worms called nematodes, and the two share a strange lifecycle. Nematodes hunt down insect larvae in the soil or on plant surfaces, burrow into their bodies, and take up residence in their blood vessels. There, they puke up the P. luminescens bacteria living inside them. Upon their release, the bacteria, which are bioluminescent and glow a soft blue, begin producing a number of chemicals that kill the insect host and suppress and kill all the other microorganisms already inside it. This leaves P. luminescens and their nematode partner to feed, grow and multiply without interruptions.

As the worms and the bacteria eat and eat and the insect corpse is more or less hollowed out, the nematode eats the bacteria. This isn’t a double cross, but part of the move to greener pastures. The bacteria re-colonize the nematode’s guts so they can hitch a ride as it bursts forth from the corpse in search of a new host.

The next meal shouldn’t be hard to find either, since P. luminescens already sent them an invitation to the party. Just before they got got back in their nematode taxi, P. luminescens were at critical mass in the insect corpse, and scientists think that that many glowing bacteria attract other insects to the body and make the nematode’s transition to a new host much easier.

A Good Light

Looking at historical records of the battle, Bill and Jon figured out that the weather and soil conditions were right for both P. luminescens and their nematode partners. Their lab experiments with the bacteria, however, showed that they couldn’t live at human body temperature, making the soldiers’ wounds an inhospitable environment. Then they realized what some country music fans already knew: Tennessee in the spring is green and cool. Nighttime temperatures in early April would have been low enough for the soldiers who were out there in the rain for two days to get hypothermia, lowering their body temperature and giving P. luminescens a good home.

Based on the evidence for P. luminescens’s presence at Shiloh and the reports of the strange glow, the boys concluded that the bacteria, along with the nematodes, got into the soldiers’ wounds from the soil. This not only turned their wounds into night lights, but may have saved their lives. The chemical cocktail that P. luminescens uses to clear out its competition probably helped kill off other pathogens that might have infected the soldiers’ wounds. Since neither P. luminescens nor its associated nematode species are very infectious to humans, they would have soon been cleaned out by the immune system themselves (which is not to say you should be self-medicating with bacteria; P. luminescens infections can occur, and can result in some nasty ulcers). The soldiers shouldn’t have been thanking the angels so much as the microorganisms.

As for Bill and Jon, their study earned them first place in team competition at the 2001 Intel International Science and Engineering Fair.

5 Fast Facts about Madam C.J. Walker

 Madam C.J. Walker items at The Women's Museum in Dallas, Texas
Madam C.J. Walker items at The Women's Museum in Dallas, Texas
Wikimedia Commons // Public Domain

During a time when Jim Crow laws were actively being passed by state legislatures and segregation was total, one self-made businesswoman managed to stand out and serve as an inspiration for female entrepreneurs and people of color in America. Born Sarah Breedlove on December 23, 1867—the sixth child in her family but the first not born into slavery—the future Madam C.J. Walker developed a line of hair products and cosmetics and became likely the first female millionaire in the country. Here are a few quick facts about her historic success story.

1. Madam C.J. Walker first worked as a laundress.

In 1888, the woman who would become Madam C.J. Walker was Sarah McWilliams, a 20-year-old widow with a toddler. After her husband's death, she moved from Mississippi to St. Louis, Missouri, where her elder brothers were working as barbers. To support herself and her daughter, Lelia, she took a job as a washerwoman. She earned roughly $1.50 a day, but managed to save up in order to provide for her daughter's education.

2. Madam C.J. Walker's hair products were made especially for black women.

At the turn of the century, many African Americans suffered from issues of hair loss and dandruff, possibly due to the harsh irritants in the lye soap used by launderers and some combination of poor hygiene conditions, low-protein diets, and damaging hair treatments. Walker herself had a chronic hair-loss problem. According to the biography On Her Own Ground: The Life and Times of Madam C.J. Walker by Walker's great-great-granddaughter A'Lelia Bundles, "if Sarah used the widely distributed patent medicines that were heavily laced with alcohol and other harsh chemicals, [she would only make] the malady worse by stripping her hair of its natural oils."

In 1904, Sarah joined African-American businesswoman Annie Turbo Malone's team of agents after using Malone's "Great Wonderful Hair Grower" product to treat her own ailments. She began investing in creating her own product, and in 1906 she married her third husband, a Mr. Charles Joseph Walker. Walker launched her own "Madam Walker's Wonderful Hair Grower" line of ointments and other products and began selling them door-to-door.

3. Madam C.J. Walker created a beauty culture empire.

Once Walker's business was nation-wide and incorporated, she expanded internationally to the Caribbean and Central America in 1913. Within the next few years, she acquired over 25,000 sales agents; she had a beauty school called the Lelia College of Beauty Culture in Pittsburg that trained her "hair culturists." By the time she died on May 25, 1919 at age 51, her business profits had skyrocketed to over $500,000 in sales annually. In fact, products inspired by Walker's can still be purchased today.

4. Madam C.J. Walker's Irvington, New York mansion will soon host more female entrepreneurs.

By the end of her life, Walker had amassed sizable wealth—she's widely considered to be the first self-made female millionaire, though specific numbers are vague. (Her New York Times obituary noted that "Estimates of Mrs. Walker's fortune had run up to $1,000,000 … She spent $10,000 every year for the education of young negro men and women in Southern colleges and sent six youths to Tuskegee Institute every year.") She also had ventures in real estate, and in 1918 her 20,000-square-foot mansion, called Villa Lewaro, was completed in Irvington, New York, about 20 miles north of her famed Walker townhouse in Harlem. In 2018, the estate was purchased by the New Voices Foundation, a group that has invested $100 million into a fund focused on providing support and leadership initiatives to women of color seeking their own entrepreneurial endeavors. Even 100 years after her death, Walker's legacy remains strong.

5. Octavia Spencer is set to play Madam C.J. Walker in an upcoming TV series.

As first reported by Deadline in 2018, Netflix has ordered an eight-episode series about Walker's life and legacy. Oscar-winner Octavia Spencer is set to star in and produce the series, and LeBron James will serve as an executive producer. While there isn't a firm release date set, the series is certain to be an eye-opening one for those unfamiliar with Walker's incredible story. The show will be based on the 2001 biography by Bundles.

Hundreds of 17th-Century Case Notes of Bizarre Medical Remedies Have Been Published Online

Illustrated portrait of Simon Forman.
Illustrated portrait of Simon Forman.
Hulton Archive/Getty Images

As medical texts, the writings of Simon Forman and Richard Napier aren't very useful. The so-called "doctors," regarded as celebrities in 16th- and 17th-century England, prescribed such treatments as nursing puppies and wearing dead pigeons as shoes. But as bizarre pieces of history, the 80,000 case notes the two quacks left behind are fascinating. The BBC reports that 500 of them have now been digitized and published online.

Forman and Napier were active in the English medical scene from the 1590s to the 1630s. They treated countless patients with remedies that straddled the line between medicine and mysticism, and their body of work is considered one of the largest known historical medical collections available for study today. After transcribing the hard-to-read notes and translating them into accessible English, a team of researchers at Cambridge University has succeeded in digitizing a fraction of the records.

By visiting the project's website, you can browse Forman and Napier's "cures" for venereal disease ("a plate of lead," "Venice turpentine," and blood-letting), pox (a mixture of roses, violets, boiled crabs, and deer dung), and breastfeeding problems (using suckling puppies to get the milk flowing). Conditions that aren't covered in today's medical classes, such as witchcraft, spiritual possession, and "chastity diseases," are also addressed in the notes.

All 500 digitized case notes are now available to view for free. And in case you thought horrible medical diagnoses were left in the 17th century, here some more terrifying remedies from relatively recent history.

[h/t BBC]

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