Guillaume-Amant Duchenne de Boulogne
1871
Icono-Photograph Album

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Published in "Annuals of Scientific Discovery: or, Year-Book of Facts in Science and Art for 1871" edited by John Trowbridge (Boston: Gould and Lincoln, 1871), Vol.10, p.284.
 
An icono-photograph album, containing numerous figures of the appearances presented by sections of the nervous centres, has just been presented by Dr. Ducheune, of Boulogne, to the French Academy of Medicine. He states he has obtained excellent results from sections of the great sympathetic nerve, the spinal ganglia, the spinal cord, and of the medulla oblongata, when magnified from 8 to 500 times. The plan was suggested some years ago by Dr. Ducheune himself, but it was found that the photographs obtained in the ordinary method were not persistent. He therefore fixed them on stone, by a process he terms photo-autography, the details of which, however, he does not communicate. It is satisfactory to find him stating that the results of his experiment and photographs only confirm the substantial accuracy of the beautiful drawing made by Dr. Lockhart Clarke on the central parts of the nervous system, and especially upon the medulla oblongata. In his later experiments Dr. Ducheune has adopted Dr. Clarke's mode of preparation with chromic acid and carmine. He states that certain micrographic details come out with wonderful clearness in the photographs, and that by this means some important additions may be made to our knowledge. Thus he has ascertained that in the white substance of the medulla oblongata there are a large number of very small nerve tubules (0.0033 m.m.) diameter mingled with others of average and of large diameter 0 m.m, 0 1 to 0 m.m, 02 and .0.3. Nature.
 
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