52 
DEPARTMENT OF PHOTOGRAPHY. 
In charge of Dr. Edward Leaming. 
315. a2) LARGE PHOTOMICROGRAPHIC APPARATUS of Messrs. Carl 
Zeiss of Jena with appurtenances. 
6) FRAMES containing some recent results in photographic 
process work, from European firms. From Chemical 
Museum, School of Mines, Columbia College. 
316. a) VERTICAL PHOTOMICROGRAPHIC APPARATUS of E. Leitz, 
Wetzlar. 
6) PROJECTION APPARATUS, after Edinger, as arranged for 
photography by E. Leitz, Wetzlar. From Wm. Kraft, 
New York. 
317. STEREO-PHOTOCHROMOSCOPE—“ An instrument which, with 
almost equal simplicity, does for color what the phonograph 
does for sound.” Frederic E. Ives, Philadelphia. 
318. KINETOSCOPE, after Edison. From Wallace & Alexander, 
New York. 
319. a) DOUBLE LANTERN, with dissolving keys, pressure gauge, 
and automatic pressure regulator. 
6) DOUBLE HIGH-PRESSURE DISSOLVING KEY. 
c) ELECTRIC ARC PROJECTING LAMP AND LANTERN, with 
variable resistance coil and frame. Stand for the same. 
From Chas. Beseler, New York. 
320. LANTERNS AND APPARATUS, exhibited by Messrs. J. B. 
Colt & Co. 
a) LANTERNS WITH OIL LIGHT. 
6) TRIPLE OXY-HYDROGEN STEREOPTICON. 
¢c) ELECTRIC DOUBLE STEREOPTICON. 
dad) ELECTRIC LANTERN AND MICROSCOPE, for Photo- 
micrography. 
e) HIGH-PRESSURE DISSOLVING KEY. 
321. a) HAND PRESS, in operation, showing method of printing 
photogravure plates. 
6) FRAMES, containing photogravures, photogelatines, plain 
and in colors. From Photogravure Co., New York. 
