LABORATORY SUPPLIES AND CHEMICALS 



349 



6190 



6190 MICROSCOPE, Spencer Lens Co. No. 15 



This microscope is a very high grade instrument. 



The Body Tube is standard size, taking standard objectives and oculars. 



The Arm is large enough to comfortably grasp same with the whole hand. 

 It is fitted with Fine Adjustment "B," which is very durable, automatically 

 taking up wear. There is no lost motion. The button is graduated 

 with 100 divisions, giving a reading of single microns. One revolution 

 moves the body tube .1 mm. 



The Revolving Stage, 120 mm. diameter, is covered with vulcanite and 

 centered by means of centering screws. The distance from optical center 

 to arm is 90 mm. This stage with 



The Mechanical Stage is in reality two stages in one. The lateral move- 

 ment is 60 mm. and the to-and-fro excursion, 38 mm. 



Rack-and-Pinion Substage, complete, equipped with Wide Angle Con- 

 denser. The 150 mm diameter mechanical stage, identical with circular 

 vernier, may be substituted for the one regularly supplied at $10.00 addi- 

 tional. 



The plain revolving stage, 120 mm. diameter, may be substituted at a 

 reduction of $20.00 from prices below. 



The cabinet is polished mahogany, lock and key. 



150 mm. diameter mechanical stage described in text above, 



Additional $10.00 



120 mm. diameter plain stage described in text above. Deduct. . . . 20.00 



