On Mounting. 55 



in the usual way, but with other tissues such as testis 

 this is utterly impossible if the sections are thin, and 

 they can only be mounted in the manner first men- 

 tioned. 



THIN SLIDES. 



For preparations to be examined, under very high 

 powers, thin slides made from glass called 9 or 10 oz. 

 crown are useful, as they allow the condenser to come 

 close to the object. 



