94 
Large Photo-micrographic and Projection Apparatus. 
Schema to establish the price according to the various re- 
quirements : 
1. Projection Table and its Appendage. 
Wood base 60X125 cm (24"X50"), mounted upon heavy 
cast-iron frame, fitted with guide-bar and adjustable sole- 
plate for microscope stand 
The sole-plate is made to take and center any of the larger 
inclinable stands. We recommend as an instrument specially 
constructed for photo-micrography and projection and solely ad- 
apted for the 35-and 70-mm projection systems (to be used with- 
out eye-pieces) the 
Photo-micrographic stand (No. 6, p. 36) 
Accessories : 
Centering achromatic condenser with iris diaphragm, to insert 
in lieu of the usual non-achromatic condenser (No. 20, p. 62) . 
Or instead of this the simpler 
Achromatic condenser without centering arrangement and 
without iris diaphragm, to insert above iris diaphragm in dia- 
phragm-carrier (No. 20") 
Centering collar for objectives used in lieu of a condenser 
for illuminating (No. 17") 
Small convex lens, to replace condenser when using very low 
powers (35 and 70 mm) 
Focussing gear for turning the micrometer-head from the 
distance (e. g. back of camera); arranged to slip on an upright 
column on sole-plate, including a Hooke's key 
To carry over 
