No. 54301. 



Photographic Apparatus. Models of Eyes. 



523 



54 298. 1 : 14. 



54 299. 1 : 6. 



54 301. 1 : 10. 



54.293. Device for receiving an Ox's Eye, Figure, with small stand for the eye lens (W. D. s. d. 

 Fig. 300302 [283285]) , 0. 6. 



54.294. Optical Eye after Kiihne, Figure, for showing the part of the rays in the eye at 

 a magnification of 10 times, myopia and presbyopia, Schemer's experiment, the path 

 of the luminous rays after operation for cataract, astigmatism and accommodation of 



the eye. The trough is arranged for filling with a fluorescent liquid 5. 10. 



Instructions for use are supplied with the Apparatus. 



54.295. Water Chamber after Friedr. C. G. Miiller (M. T. Fig. 147) 1. 0. 



54.296. Optical Eye after Grimsehl, arranged for filling with water, with diaphragm for the 

 insertion of spectacle lenses. The variations in magnitude occurring in a short-sighted 



or long-sighted eye when a spectacle lens is inserted can be measured 1. 18. 



54.297. Glow-lamp Filament, for use as an illuminating object to the preceding Apparatus 2. 0. 



54.298. NEW. Optical Eye after Lichtenecker, Figure, with adjustable iris diaphragm, 

 movable retina screen, diaphragm tube for shielding disturbing light, a second screen, 

 with handle, in order to enable the position of a retina to be shown rapidly in the short- 

 sighted or long-sighted eye; a convex lens and a concave lens with handle, and a piece 



of plaster showing the aspect of the interior of the eye 4. 10. 



54.299. Optical Eye, Figure, with two spectacle lenses for explaining their action . . 1.16.0 



Lens Apparatus after Dr. Zwick, see Nos. 53,924 53,928, pp. 496 and 497, for explaining 

 myopia and presbyopia and the path of the rays in the eye, with lenses 50 mm diameter, 

 for showing the action of lenses in general and of the camera obscura. 



54.300. 30 Drawings for showing the blind spot, Figure, after Weinhold (W. D. Fig. 303 



[286]) 0. 1.6 



54.301 . Astigmatic Test Card after Dr. .Frankel, Figure, for ophthalmologists and schools, 



for quickly determining astigmatism 0. 2. 



CI. 1478, 1479, 1480, 1482, 

 5426,5591, 1483. 



