. L'annuale americano della fotografia. preso alcun interesse in foto-micrografia conosce la nameof Woodward, il cui lavoro non è mai stato eccelso in bellezza.Ma i mezzi utilizzati da questo American savant notwithin sono alla portata di tutti ed è moltiplicando il numerodi gli operatori che il numero di scoperte saranno moltiplicati.Questo è ben compresa dai fabbricanti di microscopi,e molti tipi di apparecchiatura sono stati ideati per il foto-riproduzione grafica di oggetti microscopici, specialmente sincethe scoperta di Pasteur portato avanti batteriologia come uno 234 AMERICANO DI ANNUALE PHO

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. 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

Parole chiave associate all'immagine

• bookcentury1800
• bookdecade1890
• bookpublishernewyo
• bookyear1892