524 



Eye and Phenomena of Vision. 



No. 54 302 - 



54 303. 1 : 9. 



54304. 1 : 11. 



54305. 1:5. 



54 306. 1 : 5. 



54 307. 1 : 6. 



54.302. Device after Steinhauser, for Schemer's experiment (M. P., II, 1, Fig. 263 [359]) . 



54.303. Apparatus for explaining the plastic Vision of both Eyes and of the Stereoscope, Figure 



The distance apart of the two telescopes is variable as is also the place at which the two spheres 

 are set up. 



54.304. Wheatstone's Mirror Stereoscope, with three pairs of drawings, Figure (M. P., II, 

 1, Figs. 276 and 277 [377]) 



54.305. Stereoscope after Brewster, of mahogany, with movable mirror, Figure. . . . 



54.306. - - idem, with variable ocular distance, Figure 



54.307. Stereoscope, mounted open, Figure, of polished mahogany 



Revolving Stereoscope Apparatus, for rapidly changing the images, with variable ocular 

 distance: 



List No. 54,308 54,309 

 Arranged for 25 50 views 



Without Views 2. 2. 2. 10. 



54.310. Stereoscopic Views on paper Each 



54.311. 12 Demonstrations of Stereoscopic Lustre, after Martius-Matzdorf 



54.312. 36 Stereoscopic Drawings after Martius-Matzdorf, for demonstrating the overlapping 

 of the images, the emulation of the visual fields, the artificially produced movement 

 of the single images, the spatial vision (images of the better-known crystalline forms). 

 the occurrence of stereoscopic lustre from the surface of image (e. g., in reproductions) 



54.313. 12 Stereoscopic Views of the Firmament from excellent photographs by Prof. Max 

 Wolf (Heidelburg). First series of 12 plates with explanatory text, in portfolio . . 



The motions of planets and comets and the motion of the fixed stars can be rendered quite 

 comprehensive by the views. The photographs of the moon's landscape are shown in such great relief 

 that the height of the mountains and depth of the valleys can be gauged. 



54.315. Stereoscopic View (Girl's Head) on glass, after Ives, for explaining the spatial vision 

 of both eyes, Figure 



A grating having black lines is set up in front of the parallax stcrt-ogram which is formed of 

 perpendicular lines. The stereogram consists of two images composed of lines; the lines pertain alter- 

 nately to an image for the left and for the right eye. Kaeh eye sees its view through the spaces of tin- 

 grating and the result is a plastic image. 



54.316. -- idem, with view of moon, specially adapted for also introducing pgeudoacopic 

 vision. When the right eye assumes the position intended for the left and vice versa 

 the moon appears as a hollow sphere 



s. (1. 

 0. G. 



1.12. 



1. 2. (l 

 0. 5. 

 0. IT). 

 0. 5.0 



0. 0.6 

 0. 4.0 



0. 8.0 

 0. 8.0 



1.10.0 



1.10.0 



CM. 3395, 6094, 



1484. 1485, I486. 



