156 THE author's EXrERIMENTSc 



appeared. There was too much of the 

 acid. 



A drop of sulphuric acid was added to a 

 third gaUipot, containing the same solution of 

 albumen. In a month's time mould of the 

 articulated kind began to show itself. 



To a similar mixture ^thiop's mineral was 

 added; and, to his surprise, there came an 

 abundance both of monilia and botrytides. 



The next experiment was of the same kind, 

 except that the acid was acetic. Plenty of 

 monilia grew on the surface. 



Red oxide of mercury added to a gallipot 

 containing the same mixture, totally prevented 

 the appearance of any mould. 



Red oxide of lead, on the contrary, quick- 

 ened the growth of abundance of articulated 

 moulds. 



Caustic potash was next tried in the solu- 

 tion of albumen ; and there came a quantity 

 of botrytis, or non-articulated fungus, some 

 specimens of which were white, and some co- 

 loured, as if tinged with cochineal. ^ 



These were all the experiments he had lei- 

 sure to try, but they are quite sufficient to 

 show what wonderful matters for inquiry are 

 presented by these little fungi, and to create 



