220 VEGETABLE PARASITES. 



tion after twenty hours ; in forty-five days, a yellowish-gray cover 

 of mould, unlike the aphthae-sporidiae. 



11. Ditto, with two grains of acid stomach of a child. Reac- 

 tion neutral ; after thirty-six hours, as in No. 8 ; in three or four 

 days, opalization of the liquid zfhd a mouldy scum, with sporidia 

 and fibres resembling those of aphthae-fungi, as in No. 8. 



12. A tube with a paste of arrow-root starch and two grains of 

 scabs of aphthae. Reaction neutral; acid after twelve hours; 

 after forty-eight hours, still more acid ; cloud of fresh aphthae- 

 fungi. 



13. Ditto, with two grains of yeast-fungus. Reaction neutral ; 

 after six hours, a slight evolution of gas; acid after thirty hours. 



14. Ditto, with two grains of acid stomach. Reaction neutral ; 

 after twelve hours, acid; after thirty-six hours, as in No. 8; in 

 three or four days, infusoria and fibres, as in No. 8, without 

 sporidia of the aphthae-fungus. 



15. A tube with human milk and two grains of scabs of 

 aphthae. Reaction neutral ; after three hours, acid ; after twelve 

 hours, coagulated ; in three or four days, pretty copious genera- 

 tion of fresh sporules of the aphthae-fungus. 



16. Ditto, with two grains of yeast-fungus. Reaction neutral ; 

 after six hours, no change ; after twelve hours, acid with fermenta- 

 tion, without coagulation. 



17. Ditto, with two grains of stomach. Reaction neutral; 

 after three hours, partial coagulation ; after six hours, acid ; after 

 thirty-six hours, very acid ; stomach dissolved ; in three or four 

 days, as in No. 14. 



18. A tube was filled with cow's milk and two grains of scabs 

 of aphthae. Reaction slightly acid ; after two hours, acid reaction ; 

 after four hours, also coagulation ; after six hours, general coagula- 

 tion ; after twelve hours, still more distinct. 



19. Ditto, with two grains of yeast-fungus. Reaction slightly 

 acid ; after two hours, acid reaction ; after four hours, ditto ; 

 after fourteen hours, slight coagulation, without fermentation. 



Experiments on the question as to whether the completely pure 

 aphthae-fungi possess the power of exercising a modifying influence, 

 especially the promotion of acidification, on a solution of sugar : 



I. A few drops of the albumen of an egg were mixed with 

 water. Reaction neutral; temperature, 12 15 C. (53 59 



