A GOOD LOW-PRICED MICROSCOPE BY LEITZ 



243 



the best possible work into a spiral rack-and-pinion coarse adjust- 

 ment which works with great accuracy and smoothness, and has 

 dispensed with a fine adjustment. Its construction is neat, but it is 



Fit.. 195. Powell and Lcaland's portable microscope (184<si. 



one of the most rigid of this class of microscope which we have seen 

 or used ; this instrument is sold for twenty-five shillings. But the 

 maker has adopted Mr. Nelson's plan, using a Steinheil magnifier to 

 be mounted as a sub-stage condenser, and if a simple iris diaphragm 



K 2 " 



