Background
John Leonard Riddell was born on Feburary 20, 1807 in Leyden, Massachussets, the son of John Riddell of Preston, New York, and of Lephe (Gates).
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Excerpt from Memoir on the Probable Constitution of Matter, and Laws of Motion, as Deducible From, and Explanatory Of, the Physical Phenomena of Nature N ow in order that the pressure may be equal within and without the bag, the molecular momentum reciprocally transmitted through S, in a given time, must be equal from both directions. Therefore (vide ii 90. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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Excerpt from A Synopsis of the Flora of the Western States We are chiefly indebted to the eminent naturalist Mr. Nut tall for our knowledge of the botany of Missouri territory though the researches of Mr. Bradbury and Dr. James have aided very materially. The author regrets that he has been unable to obtain definite and satisfactory knowledge in regard to the productions of Tennessee. Perhaps enough has been gleaned however, from the writings of Pursh and Nuttall, to apologise for not excluding that state. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
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John Leonard Riddell was born on Feburary 20, 1807 in Leyden, Massachussets, the son of John Riddell of Preston, New York, and of Lephe (Gates).
He graduated in 1829 from the Rensselaer School, Troy, New York.
He secured the degree of M. D. in 1836 from Cincinnati Medical College.
He began his career lecturing on scientific subjects.
In 1835 he was appointed adjunct professor of chemistry and professor of botany at Cincinnati Medical College, and in the same year he published his Synopsis of the Flora of the Western States, the pioneer botany text of that section.
In 1836 he went at once to New Orleans as professor of chemistry in the newly founded Medical College of Louisiana (later the Medical Department, Tulane University of Louisiana), a position which he retained until his death. He compiled a catalogue of Louisiana plants which included several new species. Riddell entered vigorously into the unfolding municipal life of New Orleans.
In 1838 he was engaged in a governmental scientific exploration of the state of Texas; and upon his return became, by appointment of the president, melter and refiner in the branch United States Mint. This position he held until 1849.
In 1844 he became a member of the commission appointed by the governor and legislature of Louisiana to devise a means of protection for New Orleans against inundations of the Mississippi River. About this time he began to give much time to the study of microscopy, and later discovered the microscopical characteristics of the blood and black vomit in yellow fever. He also became a member of the commission appointed to inquire into the origin, causes, and character of the yellow fever epidemic of 1853.
According to his own account, it was in 1851 that he devised the binocular microscope, dividing light from a single objective. He put the instrument into form in 1852, arranging a combination of four glass prisms just above the objective so as to divide the light equally and pass it on to the two eyes through two parallel tubes, each with its own ocular.
He demonstrated the principle involved before the New Orleans Physico-Medico Society on October 2, 1852, and, after eliminating a pseudoscopic effect produced by his first arrangement, demonstrated a new objective before the same society on April 12, 1853.
On July 30 he displayed his binocular before the American Association for the Advancement of Science, and in August of that year commissioned Grunow Brothers of New Haven, Connecticut, to construct a microscope incorporating his innovation. This instrument, finished and sent to him in March 1854, was presented by his widow to the Army Medical Museum in Washington in April 1879. It was cumbersome, had no very high powers, and was not used in serious investigations.
His death, which occurred in his fifty-ninth year, was not unexpected, for his mind, greatly agitated by the stirring political situation at the end of the Civil War, had given signs of failure.
(Excerpt from Memoir on the Probable Constitution of Matte...)
(Excerpt from A Synopsis of the Flora of the Western State...)
(This scarce antiquarian book is a facsimile reprint of th...)
(This is a reproduction of a book published before 1923. T...)
Riddell was an active member of the first Louisiana State Medical Society, founded in 1849, and of the New Orleans Physico-Medico Society.