PILLISCHEB'S MICEOSCOPE. 91 



with a double mirror and one pair of eye-pieces, the latter 

 having rack and pinion adjustment. It is seen in fig. 46, 

 and sold as there represented for 61. a less sum than is 

 charged for altering the larger microscopes. 



Fiy. 4.7,PiUischer's No. 1 Binocular Microioopt. 



