154 MOULDS; FILAMENTOUS FUNGI; HYPHOMYCES. 



condition, as they do not take stains well. A small portion 

 of the mould colony is rubbed up gently with 50 per cent, 

 alcohol containing a few drops of ammonia, and then mounted 

 in glycerin. The cover-glass is rimmed with Tarrant's balsam 



FIG. 64. 



Microsporon furfur. (After Kaposi.) 



or sealing-wax. A permanent preparation may also be made 

 in Unna's solution : 



Gelatin, 



Alcohol, 



Solution of ammonia, 



Glycerin, 



Water, 



1 part ; 

 25 parts ; 

 25 " 

 25 " 

 35 " 



Unna recommends that the cover-slip preparation be placed 

 in 5 per cent, potassium hydroxide for one minute, rinsed in 



