6G 



THE MICROSCOPE. 



very useful in bringing out the fine markings of the most 

 difficult Diatomacese with the high-power object-glasses. 

 This instrument combines extreme steadiness with re- 

 markable simplicity, together with every motion and 



Fig. 39. Warington's Microscope. 



appliance that has ever been discovered for the microscope; 

 the compound body is supplied with a draw tube. 



