66 



PHOTO-MICROGRAPHY 



Fig- 33 



EDINBURGH MODEL. SOLD BY WATSON & SONS, OF 313 HIGH HOLBORN, LONDON, W.C. 



DIMENSIONS. 



INCHES 



Height when in vertical position and body racked down . 12 



Height of stage .......... 44 



Height of optical axis when horizontal . . . . 7^ 



Diameter of mirrors . . . . 2 



Internal diameter of draw tube | 



