CM. //.] 



LABOR A TORY MICROSOPES. 



65 a 



Fig. joa . — Spencer-Winkel form of Mechanical Stage. It is readily attachable 

 to any microscope with rectangular stage, by tzuo clamping screws on the right. 

 Its range of motion is about 30 X 60 nun., thus enabling one to study as large a 

 series as is usually put on an ordinary slide. 



Fig. job. — {See next page.) Spencer Lens Company's Microscope No. 1. This 

 microscope is also furnished with a tube and oculars of the same diameter as those 

 on the Zeiss microscopes for investigators who prefer the small tube. 



