and Laboratory Methods. 



1283 



The Photo-Micrography of Tissues with Simple Apparatus. 



The growing importance of photo-micrography has been greatly enhanced 

 within a few years by improvements in the half-tone processes of reproducing 

 prints ; improvements which have now reached such a degree of perfection as to 

 make the reproductions in many cases excel the originals, and this work being 

 done at a very trifling cost, places in the hands of every microscopist ideal facil- 

 ities for illustrating the result of his labors to an extended audience, provided of 

 course he is familiar with photo-micrography, and can make micrographs of his 

 subjects. 



The appliances for doing this have kept pace with the general progress in all 





FIG. 1. GIANT CELL SARCOMA. XIOO. 



microscopical manipulations and technique. With homogeneous apochromatics, 

 projection oculars, substage condensers of high numerical apertures, and stands 

 of marvellously perfect workmanship constructed especially for the purpose, nnd 

 having every conceivable convenience, it would seem that the limit of optical 

 possibilities had been reached. If to these we add the specially designed cam- 

 eras, combining in one the suggestions of many workers ; orthochromatic or 

 "color correct" plates and the many new, clearly and very perfectly developing 

 reagents, it would likewise seem that the photographic branch of the subject has 

 kept pace with the optical. In artificial illuminants we are equally fortunate. 

 The electric current is almost universally available and arc lamps of great sim- 

 plicity and steadiness are to be had at comparatively moderate cost. The new 

 acetylene light, one of the most perfect of radiants for photo-micrography, is also 

 available everywhere at no more expense than the old coal oil flame. In short, 

 to the man with a desire for photo-micrography and a full purse, the world's 



