64 



PHOTO-MICROGEAPHY 



Fig. 31 



FOUR-LEGGED MICROSCOPE. SOLD BY SWIFT & SON, OF 81 TOTTENHAM COURT ROAD, W. 



DIMENSIONS. 



Height when in vertical position and body racked down 10 



Height of stage 4i 



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



Spread between the two front feet 8 



Spread between the two back feet 7 



Diameter of mirrors 



Internal diameter ot draw tube ....... i^tt 



