John Leonard Riddell
Encyclopedia
John Leonard Riddell was a science lecturer, botanist, geologist, medical doctor, chemist, microscopist, numismatician, politician, and science fiction author in the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. He was born in Leyden, Massachusetts
Leyden, Massachusetts
Leyden is a town in Franklin County, Massachusetts, United States. The population was 772 at the 2000 census. It is part of the Springfield, Massachusetts Metropolitan Statistical Area.-History:...

, the son of John Riddell and Lephe Gates. He received his B.A. and M.A. at Rensselaer Polytechnic Institute
Rensselaer Polytechnic Institute
Stephen Van Rensselaer established the Rensselaer School on November 5, 1824 with a letter to the Rev. Dr. Samuel Blatchford, in which van Rensselaer asked Blatchford to serve as the first president. Within the letter he set down several orders of business. He appointed Amos Eaton as the school's...

 from professor Amos Eaton
Amos Eaton
Amos Eaton was a scientist and educator in the Troy, New York area.Eaton attended Williams College; after graduating in 1799 he studied law in New York City and was admitted to the state bar in 1802. He practiced law in Catskill, New York until 1810, when he was jailed on charges of forgery...

 and his M.D. from Cincinnati College in 1836.

He lectured in Ogdensburg, New York
Ogdensburg, New York
Ogdensburg is a city in St. Lawrence County, New York, United States. The population was 11,128 at the 2010 census. In the late 18th century, European-American settlers named the community after American land owner and developer Samuel Ogden....

, and then in Philadelphia and Cincinnati. From 1836 until his death in 1865, he was Professor of Chemistry at the Medical College of Louisiana (now Tulane University
Tulane University
Tulane University is a private, nonsectarian research university located in New Orleans, Louisiana, United States...

) in New Orleans. While there, he invented the first practical microscope
Microscope
A microscope is an instrument used to see objects that are too small for the naked eye. The science of investigating small objects using such an instrument is called microscopy...

 to enable binocular viewing of objects through a single objective lens. In 1850, he also undertook one of the earliest and most extensive American microscopic investigations of cholera
Cholera
Cholera is an infection of the small intestine that is caused by the bacterium Vibrio cholerae. The main symptoms are profuse watery diarrhea and vomiting. Transmission occurs primarily by drinking or eating water or food that has been contaminated by the diarrhea of an infected person or the feces...

.

Riddell published a science fiction story giving an account of a fictional former student named Orrin Lindsay, who travelled to the moon and Mars.

Following his botanical explorations of Texas, he was appointed melter and refiner of the New Orleans Mint
New Orleans Mint
The New Orleans Mint operated in New Orleans, Louisiana, as a branch mint of the United States Mint from 1838 to 1861 and from 1879 to 1909. During its years of operation, it produced over 427 million gold and silver coins of nearly every American denomination, with a total face value of over...

, a position confirmed by President John Tyler
John Tyler
John Tyler was the tenth President of the United States . A native of Virginia, Tyler served as a state legislator, governor, U.S. representative, and U.S. senator before being elected Vice President . He was the first to succeed to the office of President following the death of a predecessor...

 following an internal mint dispute. He likewise was appointed Postmaster of New Orleans, which position he held even during the Civil War
American Civil War
The American Civil War was a civil war fought in the United States of America. In response to the election of Abraham Lincoln as President of the United States, 11 southern slave states declared their secession from the United States and formed the Confederate States of America ; the other 25...

 despite Confederate appointments intended to displace him.

Active in local and state politics, he seems to have claimed to have been elected Governor of Louisiana in November, 1863 and sworn in by a Justice of the Peace in January, 1864. During this time the military Governor George F. Shepley was still in actual power. His governorship was rejected in the course of a Congressional inquiry into a contested election in the House.
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