. L'Américain de la photographie annuelle. pris un intérêt dans la photo-micrographie connaît le nameof Woodward, dont le travail n'a jamais été excellé dans beauté.Mais les moyens employés par ce savant américain notwithin sont la portée de tous - et c'est en multipliant le nombre d'opérateurs que nombre de découvertes seront multipliés.C'est bien comprise par les fabricants de microscopes, et de nombreux types d'appareils ont été mis au point pour la photo-reproduction graphique d'objets microscopiques, surtout puisque la découverte de Pasteur mis en avant comme l'un 234 bactériologie L'AMÉRICAIN DE ANNUEL PHO

• Contributeur: The Reading Room / Alamy Banque D'Images
• ID de l’image: 2AG1KT2
• Taille du fichier: 7,1 MB (255,9 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1174 x 2127 px | 19,9 x 36 cm | 7,8 x 14,2 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. The American annual of photography. taken any interest in photo-micrography knows the nameof Woodward, whose work has never been excelled in beauty.But the means employed by this American savant are notwithin the reach of all—and it is by multiplying the numberof operators that the number of discoveries will be multiplied.This is well understood by the manufacturers of microscopes, and many kinds of apparatus have been devised for the photo-graphic reproduction of microscopical objects, especially sincethe discovery of Pasteur brought bacteriology forward as one 234 THE AMERICAN ANNUAL OF PHOTOGRAPHY, of the principal fields of medical research. But bacterias areprepared in resinous compositions, as also many histologic pre-parations, and even diatomacece, which for a long time heldthe first rank among microscopical subjects, are equally pre-pared dry or in solid media; hence, the horizontal position ofthe apparatus—but many interesting microscopical subjects aremade by means of liquids—and very often the observer. would like to keep traces of facts which he may meet in anextemporaneous preparation. This cannot be done with thehorizontal apparatus, and, besides, it would necessitate the useof a microscope with an inclined body—always a high-pricedinstrument. This difficulty has been obviated with the instru-ment which we wish to describe, invented by the successors of AND PHOTOGRAPHIC TIMES ALMANAC. 235 the well-known house of Prazmowski, Messrs. Bezu Hausser& Co. The apparatus is simple, strong, easy to handle, notcumbersome, and as may be seen by the accompanying cutit is vertical and can therefore be used with dry and liquidpreparations. A recent improvement makes it possible to useit with an ordinary photographic lens of short focus ; whichpresents the advantage that quite large subjects can be photo-graphed, even when it is necessary to keep them in a shallowtray under a coating of liquids. It is therefore suitable for allthe operations which take plac

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1890
• bookpublishernewyo
• bookyear1892