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.

Highway Fidelity: When Cars Came With Record Players

Fox Photos/Getty Images
Fox Photos/Getty Images

In the winter of 1956, Chrysler unveiled a series of improvements to their lineup of automobiles. There was LifeGuard, a latch that prevented doors from flinging open in the event of an accident. New windshield wipers promised to clean 10 percent more of the glass surface than the previous year’s model. And for those consumers willing to spend an extra $200—the equivalent of about $1700 today—there was the Highway Hi-Fi, a factory-installed record player mounted under the car's dashboard.

Using an “elastic three-point suspension,” the unit played “non-breakable” 7-inch records. In advertising copy, Chrysler touted that the discs would never skip, not even during sharp turns or while crossing railroad tracks. “It’s almost impossible to jar the arm off the record,” the company promised, anticipating the dubious looks of dealers and buyers alike.

As it turned out, attempting to spin a record while in a moving vehicle was every bit as problematic as it might sound. But before 8-tracks, cassettes, CDs, and satellite radio, the Highway Hi-Fi represented the first opportunity for drivers to have some control over what they were listening to. They had autonomy—freedom to deviate from radio programmers, invasive ads, and boring talk shows.

Naturally, radio stations hated the idea.

A Chrysler car record player mounted under the dashboard
Courtesy FCA US

This bizarre automotive alteration was the result of an engineering genius who wanted to get his kid to shut up. Peter Goldmark was head of CBS Labs, a position which afforded him the resources to pursue other innovations. (He’s widely credited with ushering in the modern system of broadcasting color television.) He was the inventor of long-play (LP) records, which played vinyl at 33 and one-third revolutions per minute (RPM) instead of 78. Introduced in 1948, LPs revolutionized the music industry, packing more information onto the 12-inch discs by etching microgrooves into the vinyl and allowing producers to place up to 60 minutes of music on a side.

In the 1950s, Goldmark’s son observed that drivers had no influence over what was being broadcast via the transistor radios that had become standard in vehicles. While you could switch stations, you were still at the mercy of programming directors and their tastes in music.

As inventors tend to do, Goldmark identified the problem and then sought out a way to remedy it. His own creation, the LP, was far too big to have any practical application in a vehicle: The turntable would hang over a passenger’s knees. The 45 RPM record was much smaller but could only hold about five minutes of music on each side. Forcing someone to try and change records with such frequency while driving would likely result in accidents.

Goldmark devised a new option. Using a 7-inch record, he created a surface with ultra-microgrooves that played at 16 and two-thirds RPM. Each side could hold 45 minutes of music, a far more practical solution for people who couldn’t tend to the turntable easily. It also fit snugly under the dash, projecting out at the push of a button so the user could load a record and set the needle before pushing it back underneath and out of the way.

Goldmark made other adjustments. The vinyl records were thicker than standard LPs so they would be more heat-resistant during the summer months. He also developed a spring enclosure to absorb shocks and a counterweighted needle arm to make sure it wouldn’t leap off the record while traveling over bumps.

Goldmark tested it in a CBS executive’s Thunderbird. It worked flawlessly. He loved it.

CBS CEO William Paley hated it.

Paley equated the innovation to a form of self-sabotage. CBS had radio affiliates all around the country beaming their signals into millions of cars; those stations sold advertising spots to generate revenue. If drivers began listening to their own records instead of the radio, they were effectively diluting their own audiences. Paley thought sponsors would have a tantrum. He dismissed the idea entirely.

Perhaps feeling slightly petulant, Goldmark instead went directly to his potential customer: a car manufacturer. Visiting with Chrysler executive Lynn Townsend, Goldmark sold the company on the dashboard record player as a factory option. He rode along during a test drive, with Chrysler employees driving over bumps, railroad tracks, and other obstacles to see if the record skipped. It didn’t. The company ordered 18,000 Highway Hi-Fi units, a sizable investment that Paley couldn’t ignore.

CBS Labs mass-produced the devices, and Chrysler began instructing their dealers to pitch the add-on to prospective buyers. Each unit would come with six records, with the option to buy more through CBS-Columbia, a record label that manufactured the unique discs. Owing to Paley’s influence—he detested rock music—the choices were extremely placid. Car owners got the soundtrack to the Pajama Game Broadway musical, some Tchaikovsky, a jazz record, a dramatic reading of a George Bernard Shaw play, and songs from Disney’s Davy Crockett television series. (The latter was advertised to “help keep [kids] quiet.”) The catalog offered spoken-word reenactments of the Battle of Gettysburg.

Owing to their smaller grooves, the records couldn’t be played on conventional turntables. Given the selection, that was probably a blessing.

A print ad for a Chrysler car record player
Courtesy FCA US

The limited selection was one problem. The functionality of the Highway Hi-Fi was another. Goldmark had tested the device in a Thunderbird and in high-end Chrysler vehicles, but the company offered the machine in their economical Dodge and Plymouth models, which both had modest shock absorption. The records could and did skip, and the models were the source of several claims against the car’s warranty coverage. Local mechanics weren’t audiophiles and didn’t have the knowledge to make simple repairs. As word spread, Chrysler went from selling 3685 Hi-Fi units in 1956 to just 675 in 1957.

The option was discontinued shortly thereafter, but that wasn’t quite the end for car-mounted records. In 1960, RCA thought they had resolved some of the outstanding issues with their Victrola, which played 45s and overcame the short running time problem by constructing a 14-disc changer. When one record was finished, the unit would automatically drop another in its place. Similar to a jukebox, the needle was upside down and the record lowered on top of it to reduce skipping. Records slid into a slot in a manner similar to the CD players that were decades away.

The Victrola was picked up by Chrysler. It performed better than the Highway Hi-Fi, was cheaper ($51.75), and didn’t force users to limit themselves to the paltry selection of CBS’s custom discs. But it didn’t last long either; it was discontinued in 1961. (Another option, the UK’s Auto-Mignon, played 45s with manual switching: Each of the four Beatles was said to own one.) Before anyone could think to improve upon it further, 8-tracks arrived and soon became the portable car sound source of choice. CBS never followed through on plans to equip taxis, airplanes, buses, and other forms of transportation with their devices. In the evolution of on-demand music and auto transportation products, the Highway Hi-Fi was one step best skipped.

The Time 14 Cargo Ships Were Trapped in the Suez Canal ... for Eight Years

iStock
iStock

Egypt and Israel had a salty relationship in the mid-20th century. In 1967, war broke out between the two and Israel captured the Sinai Peninsula next door. In response, Egypt attempted to cripple the Israeli economy by blockading the Suez Canal with sunken ships, mines, and debris—trapping 14 unlucky foreign cargo ships in the canal for eight years.

Marooned on the canal's Great Bitter Lake, the ships—British, French, American, German, Swedish, Bulgarian, Polish, and Czechoslovakian—“clustered in the middle of the lake like a wagon train awaiting an Indian attack,” reported The New York Times [PDF]. Israel controlled the east bank of the canal; Egypt, the west. The sailors watched helplessly as both sides exchanged gunfire and rockets over their heads.

“We were in a very comfortable prison,” Captain Miroslaw Proskurnicki of the Polish ship Jakarta said. “The first month was like a holiday. The second month was very hard. By the end of the third month, it was terrible.” With nothing to do besides clean the ships and do basic maintenance, the boats puttered aimlessly around Great Bitter Lake in an attempt to keep the engines well-tuned. With nowhere to go, the crews eventually set aside their homelands' differences, moored together, and formed an unofficial micronation of sorts, calling themselves the “Yellow Fleet,” a reference to the windswept sand that piled on their decks.

Each ship adopted a special duty to keep the "country" running smoothly. The Polish freighter served as a post office. The Brits hosted soccer matches. One ship served as a hospital; another, a movie theater. On Sundays, the German Nordwind hosted "church" services. “We call it church,” Captain Paul Wall told the Los Angeles Times in 1969. “But actually it is more of a beer party.” (The Germans received free beer from breweries back home.)

Beer was the crew’s undeniable lifeblood—one of the few things to look forward to or write home about. “In three days we tried Norwegian beer, Czechoslovak beer and wine and Bulgarian beer and vodka,” Captain Zdzislaw Stasick told The New York Times in 1974. In fact, the stranded men drank so much beer—and tossed all of the bottles into the lake—that sailors liked to joke that the lake’s 40-foot deep waters were actually “35 feet of water, and 5 feet of beer bottles.” As the British captain of the Invercargill, Arthur Kensett, said: “One wonders what future archaeologists in a few thousand years’ time will think of this.”

It was like adult summer camp. The men (and one woman) passed the time participating in sailing races and regattas, water-skiing on a surfboard pulled by a lifeboat. They played bingo and cricket and held swim meets. It was so hot outside, they regularly cooked steaks atop 35 gallon drums. During the 1968 Tokyo Olympics, they hosted the “Bitter Lake Mini-Olympics,” with competitions in weightlifting, water polo, air rifle shooting, high jumping, and, of course, swimming. (Poland won the gold.) During Christmas, they installed a floating Christmas tree and lowered a piano onto a small boat, which roved around the lake and serenaded each ship. The Yellow Fleet dubbed themselves the “Great Bitter Lake Association” and made special badges. They even had a club tie.

By the mid-1970s, much of the cargo the vessels had been carrying was rotten. The original shipments of the remaining wool, rubber, and sheet metal—which had been loaded in places as far away as Australia and Asia—were no longer needed. The Yellow Fleet resembled a ghost town, manned by world-weary skeleton crews.

Their patience was rewarded. By 1975, approximately 750,000 explosives had been successfully removed from the Suez Canal, making escape possible. The Great Bitter Lake Association disbanded, and the vessels of the Yellow Fleet finally returned to their separate homes. But by that point, the crew had learned that, no matter your circumstances, home is truly where you make it.

SECTIONS

arrow
LIVE SMARTER