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2020-03-25 10:49:10
Donné, Alexandre
De l'origine des globules du sang, de leur mode de formation de leur fin (pp.366-368).
C. R. Acad. Sci., 14/10. - Paris, Séance du Londi 7 Mars 1842, pp.349-378, Leinenband. First Edition! Alexandre Donné (1801-1878) announces the discovery of the blood platelets. First Edition! Alexandre Donné (1801-1878) "announces the discovery of the blood platelets". G/M "To the practical application of microscopy Alfred Donne, who was, as we shall see, a pioneer, contributed in an unprecedented manner. In July of 1839 Louis Jacques Daguerre, one of the inventors of photography, presented his discovery to the Academie des Sciences de Paris. On February 24, 1840, Alfred Donne presented to the same forum some photographic pictures of natural objects magnified by a solar microscope by means of oxyhydric light. He improved his technic and obtained with the composed microscope photographic pictures of which his Atlas, published in 1845, shows remarkable reproductions. It was Alfred Donne who foresaw the helpful role that projections of microscopic pictures could play during lectures on micrography. The page he wrote on this subject deserves to be quoted. If the number of students became important, if there were more than twenty in a lecture, how could one show to each of them, to unexperimented eyes, minute objects of an often difficult preparation and be sure that such detail of structure will not be mixed up with another detail, without prolonging these demonstrations beyond the time the student can devote to these studies? . . . After having made my first attempt at teaching a limited audience with a few microscopes, I understood the necessity of using all me … [Click Below for Full Description]
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