Science and Medicine

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Entry Category: Science and Medicine

Silitch, Mary Frances

Mary Frances Files Silitch is the first woman to be editor-in-chief of a national aviation magazine. A licensed pilot, she has flown 250 kinds of aircraft and logged 5,000 hours of flight. Mary Frances Files was born on November 9, 1935, in Little Rock (Pulaski County) to William Thomas Files and Johnnie Caldwell Files of Parkdale (Ashley County); she has two sisters. Her first flight was in an open-cockpit crop-duster airplane over the family farm at the age of four. She attended schools in Parkdale and Wilmot (Ashley County) but graduated from All Saints Episcopal School in Vicksburg, Mississippi. She attended Southwestern at Memphis (now Rhodes College), where she began her journalism career as the managing editor of the Sou’wester, …

Silverfish

aka: Bristletails
Silverfish are small, wingless insects in the order Zygentoma (formerly Thysanura). There are four families: Lepidotrichidae (single species), Lepismatidae (about 200 species), Maindroniidae (three species), and Nicoletiidae (about twenty species). In the late twentieth century, it was recognized that the two suborders were not sister taxa; therefore Thysanura was paraphyletic, and the two suborders were each elevated to the status of an independent monophyletic order, with Archaeognatha the sister taxon to the Dicondylia, including the Zygentoma (fishmoths, firebrats, and silverfish). A nicoletiid, Speleonycta ozarkensis, occurs in eight different cave systems in Arkansas in Benton and Newton counties and in Oklahoma in Adair, Cherokee, and Delaware counties. In concert with jumping bristletails (Order Microcoryphia), the predecessors of silverfish are considered the …

Slime Molds

Slime molds are among the more interesting yet relatively little known organisms found in Arkansas. They do not have a particularly attractive name, but some examples produce fruiting bodies that are miniature objects of considerable beauty. The organisms commonly referred to as slime molds actually belong to two different taxonomic groups—the myxomycetes and the dictyostelids. Members of both groups are common-to-abundant organisms in forests throughout Arkansas, but only the myxomycetes (also called plasmodial slime molds) can be observed directly in nature. As a result, the myxomycetes are by far the better known group, and to most people (including many biologists), they are the only “slime molds” of which they are aware. However, the dictyostelids (also known as cellular slime molds) …

Smallpox

Smallpox is an infectious disease characterized by the formation of a rash and blisters across the face and extremities. With an overall mortality rate of approximately thirty-five percent, it was one of the most feared diseases in the world before coordinated vaccination efforts resulted in the disease being eradicated in 1979. In Arkansas, smallpox greatly affected Native Americans and played a role in the creation of later public health initiatives. Smallpox was first introduced into North America by European explorers, who brought to the New World any number of diseases to which Native Americans had not previously been exposed. Some historians estimate that perhaps ninety percent of the indigenous population of the Americas may have been killed by diseases brought …

Smelts

aka: Osmerids
Smelts belong to the family Osmeridae and order Salmoniformes. There are seven genera and about eleven species. Fishes of the genus Osmerus, to which the rainbow smelt (O. mordax) belongs, include the following: a North Pacific and Arctic species, O. dentex; the European smelt (O. eperlanus) of the Eastern North Atlantic; and the landlocked pygmy smelt (O. spectrum) of eastern Canada and New England, which some authorities suggest is not a valid species. In general, smelts are north circumpolar in geographic distribution, and they occur in marine and freshwater habitats in Asia, Europe, and North America. They date to the Paleocene Epoch (over 55 million years ago). The closest relatives are galaxioid (Protacanthopterygiid) fishes, and the marine argentinoid fishes are …

Smith, Morgan

Morgan Smith—a physician, administrator, and legislator—was a leader in the drive to improve public health and medical education in Arkansas. Following his service as dean of the Arkansas Medical School, now the University of Arkansas for Medical Sciences (UAMS), from 1912 to 1927, he represented Pulaski County as a Democrat in the state House of Representatives from 1928 to 1934. Born on March 8, 1868, in El Dorado (Union County), Morgan Smith was the second son of James Monroe Smith, who was a planter and merchant, and Mary Josephine Morgan Smith. He had two brothers and one sister. His father, who formerly served in various county offices, was a state senator and a representative from Union County. Educated in the …

Smith, Willis S.

Dr. Willis S. Smith was a regionally significant teacher, sheriff, farmer, doctor, and writer in early southwestern Arkansas. Willis Smith was born on August 10, 1810, in Todd County, Kentucky, a frontier community. He was the fifth of twelve children of Millington Smith and Barbara Barton Smith. He was the grandson and namesake of Revolutionary War soldier Willis S. Smith, who was killed at the Battle of Bunker Hill. Smith had little opportunity for an education, and he could barely read or write even at twenty years of age. He left his home in Johnson County, Illinois, for Rock Springs Theological Seminary in Rock Springs, Illinois, where he received sufficient education to become a teacher at the school himself. One …

Snake Fungal Disease

aka: Ophidiomycosis
Snake fungal disease (ophidiomycosis) is an emerging infectious disease of numerous species of snakes caused by the fungus Ophidiomyces ophiodiicola within the family Onygenacea. Formerly, Ophidiomyces was classified as the Chrysoporium anamorph of Nannizziopsis vriesii species complex (CANV species complex), a group of fungi that are frequently associated with emerging infections in various groups of reptiles. However, recent phylogenetic analyses have demonstrated that CANV represents a species complex that also includes fungi of the genera Nannizziopsis and Paranannizziopsis and that Ophidiomyces is known to occur only on both colubrid and viperid snakes. It was first definitively identified in 2006 in a population of timber rattlesnakes (Crotalus horridus) in New Hampshire. However, although identification has not been conclusively proven because cultures …

Sneed Tornado of 1929

aka: Tornado Outbreak of April 10, 1929
The only F5 tornado ever recorded in Arkansas destroyed the Sneed and Pleasant Valley communities in Jackson County on April 10, 1929, one of a series of twisters on that day that claimed at least fifty-four lives in the state. At least eight tornadoes hit northeastern Arkansas on April 10, 1929. The most powerful, with wind speeds of 261 to 318 miles per hour, formed near Batesville (Independence County) and traveled northeast, entering Jackson County at about 6:15 p.m., with a half-mile-wide path. As it approached Pleasant Valley (also known as Possum Trot) north of Swifton (Jackson County), people sought shelter in homes that were quickly destroyed by the tornado “dipping down into the farm communities as if a gigantic …

Snodgrass, William Anderson

William Anderson Snodgrass was an instructor at the University of Arkansas Medical School (which later became the University of Arkansas for Medical Sciences). During World War I, he organized Hospital Unit T and served as a major in the United States Medical Department in England and France. William Snodgrass was born on March 17, 1874, to Andrew J. Snodgrass and Elmira F. Masterfield Snodgrass at Murray, Kentucky. When he was ten, his family moved to Little Rock (Pulaski County). After completing public school and his premedical courses, he entered the Medical School of the University of Arkansas. He graduated in 1896 and was employed as Little Rock’s city physician in 1898. In 1898, he married Lelia Phillips, and they had …

Snyderman, Nancy Lynn

Nancy Lynn Snyderman is a physician and author who became a well-known medical journalist and broadcaster. She began her broadcasting career in Little Rock (Pulaski County). Nancy Snyderman was born in St. Louis, Missouri, on March 26, 1952. Her parents were homemaker Joy Snyderman and physician Sanford Snyderman. Growing up in Fort Wayne, Indiana, she graduated from that city’s South Side High School in 1970. She attended Indiana University in Bloomington, where she graduated with a BA in microbiology. Her medical training took place at the University of Nebraska Medical Center in Omaha, where she earned her Doctor of Medicine degree in 1977. During the second year of her residency at the University of Pittsburgh, she discovered an affinity for …

Society for the History of Medicine and Health Professions

The Society for the History of Medicine and the Health Professions was established as a support group for the Historical Research Center (HRC) of the University of Arkansas for Medical Sciences (UAMS) Library in Little Rock (Pulaski County). It supports research into the history of the health sciences in Arkansas. The society was founded in September 1981 by an executive committee composed of Dr. Robert Watson (the first neurosurgeon in Arkansas and a member of the UAMS College of Medicine faculty) as chair, Marie Smith (wife of Dr. John McCollough Smith), Dr. Horace Marvin (UAMS College of Medicine associate dean for academic affairs), Paul Harris (executive director of the Pulaski County Medical Society), and Edwina Walls (head of the HRC). …

Sogandares, Lidia Gertrudis

Lidia Gertrudis Sogandares was the first Latin American woman to be accepted into the University of Arkansas School of Medicine (now the University of Arkansas for Medical Sciences—UAMS). A pioneer in medicine, she was the first woman to become a physician in Panama and one of the first female doctors in Central America. Sogandares became renowned in the medical fields of obstetrics and gynecology. Lidia Sogandares was born on October 17, 1908, on the island of Taboga in the Gulf of Panama. She grew up in a large family with four brothers and a younger sister. During her childhood, her father went to work for the National Navigation Company in Panama and later moved his family to Panama City. She …

Solar Eclipse of 1834

A total solar eclipse is a phenomenon in which the moon totally obscures the bright light of the sun, leaving only the faint corona visible. Some residents of Arkansas Territory and some states in the South could see such an eclipse on November 30, 1834. The Arkansas Gazette announced the impending event in December 1833 by running an excerpt from the American Almanac stating that “the most remarkable of the phenomena that this year will happen, is the eclipse of the sun on Sunday, the 30th of November,” being total “in a small part of the territory of Arkansas” and in the states of Mississippi, Alabama, Georgia, and South Carolina. The article noted that “a great depression of the thermometer, …

Solar Eclipse of 1918

The second of two recorded total solar eclipses—in which the moon totally obscures the sun, leaving only the corona visible—that could be seen in Arkansas occurred on June 8, 1918. While the first, in 1834, was clearly observed as a “magnificent phenomenon of nature in all its sublimity,” the 1918 event was reported as “somewhat of a disappointment.” On January 3, 1918, the Arkansas Gazette announced that June 8, 1918, would be “a gala day for astronomers,” as a total solar eclipse would cross the United States, beginning in northern Oregon and traveling to northern Florida “at a speed of something like 1,000 miles an hour.” The Hot Springs New Era noted a few weeks later that Mount Ida (Montgomery …

Solar Eclipse of 2024

The solar eclipse of 2024 was one of three eclipses for which Arkansas lay within the “path of totality,” or the path of the eclipse when total darkness would be experienced. The previous ones occurred in 1834 (when Arkansas was still a territory) and 1918. The most recent previous total solar eclipse to cross the United States, the eclipse of August 21, 2017, produced a path of totality that went from the Pacific Northwest in Oregon and proceeded southeast toward South Carolina. The first such American eclipse in the era of the smartphone and social media, the 2017 event was a major media spectacle, and areas within the path of totality experienced an enormous influx of visitors. Arkansas did not …

Southall, James Henry

James Henry Southall was a founding member of the Medical Department of Arkansas Industrial University, the precursor to the University of Arkansas for Medical Sciences (UAMS). Southall was born on November 5, 1841, in Smithville, Virginia, the son and grandson of distinguished Virginia physicians. After the completion of his education and the interruptions of life caused by the Civil War, Southall moved to Little Rock (Pulaski County) at a time when the local medical community was beginning to consider forming a medical school in the state. As with many physicians of his era, Southall had begun his medical education by reading medicine under the tutelage of a professional, Dr. Robert Tunstall of Norfolk, Virginia. He attended medical school at the …

Southern Cavefish

aka: Typhlichthys subterraneus
The southern cavefish (Typhlichthys subterraneus) is one of the two species of blind cave fishes found in Arkansas. The other is the Ozark cavefish. The southern cavefish is found in the subterranean waters of two major non-overlapping ranges separated by the Mississippi River: in the Ozark Plateau of central and southeastern Missouri and northeastern Arkansas and in the Cumberland and Interior Low plateaus of northwest Alabama, northwest Georgia, central Tennessee, and Kentucky. They are usually found at considerable depths (mostly between 175 and 240 meters below the land surface). This species, which can grow as long as ninety millimeters, has a large, broad head. The caudal fin has from zero to two rows of sensory papillae (one on the upper …

Speckled Pocketbook

aka: Lampsilis streckeri
The speckled pocketbook is a bivalve mollusk belonging to the family Unionidae, commonly referred to as freshwater mussels, naiads, or clams. Each freshwater mussel is composed to two halves (valves) of a hard outer shell with the living animal (soft tissues) residing securely inside. The speckled pocketbook, scientific name Lampsilis streckeri, was described as a species new to science in 1927 by Lorraine Screven Frierson, a naturalist and landowner/merchant/planter residing south of Shreveport in the company town of Frierson, Louisiana. Frierson named the species in honor of his friend, colleague, and fellow naturalist John K. Strecker of Waco, Texas. Adults may reach a length of slightly more than 3.5 inches (or more than 90 millimeters), with a maximum life expectancy …

Sponges

The phylum Porifera, which contains the sponges, is a highly successful group of metazoan animals that includes about 8,600 living species of marine and freshwater forms as well as some that inhabit brackish waters. The majority are marine, but there are about 150 species of freshwater sponges, including twenty-seven to thirty species found in North America north of Mexico. The family Spongillidae is the most speciose and widespread group of freshwater sponges and includes twenty-two genera and more than 130 species from a wide variety of habitats. Seven species of freshwater sponges have been documented in Arkansas. Sponges are an ancient group of asymmetrical invertebrates with a fossil record preceding the early Cambrian period (541 million years ago), and even …