64 



THE AMERICAN MONTHLY 



[April, 



I 



ral small accessories and case, the 

 stand, as figured, sells for $55.00. 



When fitted with a movable glass 

 stage it sells for $G0.00, together 

 witli the same accessories. 



Mr. "W. H. Walmsley, of Phila- 

 delphia, is the agent for Messrs. R. & 

 J. Beck, of London, and he keeps 

 a full line of their goods, constantly 

 on hand. 



Fig. i6. 



The Preparation and Mounting 

 of Microscopic Objects. 



I. CEMENTS AND APPAEATUS. 



Before entering upon a descrip- 

 tion of the processes of preparing 



slides for the microscope, a few in- 

 troductory remarks will be made. 

 It is always a source of satisfaction 

 to possess a good series of prepara- 

 tions, mounted at home, on slides 

 which are well prepared and attrac- 



