95 
No. 
Maries 
Carried over 
Optical Outfit of the Guide Bar. 
Iris diaphragm of 67 mm greatest aperture, with spring- 
clips. On stand, which also serves as a support for a ground 
glass disc 
Id. with micrometer adjustment in the direction of the optic 
axis and fitted with clips, the whole serving as an object-stage 
when it is required to project large objects by means of macro- 
photographic lenses 
Stand with two light-filters 
1) For sun -light. 
Plane reflecting mirror, on stand, with coarse and fine ad- 
justment about horizontal and vertical axis 
Heliostat (by R. Fuess in Berlin), adjusted for the polar al- 
titude of the place, which serves to keep the direction of the 
incident rays approximately constant; with large mirror . . . 
30.— 
45.— 
24.— 
45. 
270. 
2) For electric arc, zircon or magnesia light. 
Collective system of 120 mm (5") useful aperture, with shell 
to screw in the light 
Heat filter (water-chamber) 
Stand for projection lenses of long focus (photographic systems) 
Adapters for special or foreign lenses 
3) For 1 a m p - 1 i g h t. 
Biconvex lens on stand 
To carry over 
150.— 
47.— 
24.— 
2.50 
30. 
