MEDIUM-POWER PHOTO-MICEOGRAPHY 



Fig. 28a 



SOLD BY R. & J. BECK, OF CORNHILL 



DIMENSIONS. 



Height when in vertical position and body racked down 

 Height of stage 



Height of optical axis when in horizontal position 



Spread of tripod foot 



Diameter of mirrors 



Internal diameter of draw tube 



INCHES 



9 



4h 

 7 



T 0 



