EXPERIMENTS. 217 



(thrush) with aphthae and stomatitis. He speaks of two forms of 

 thrush. The first kind, which he only observed during an epidemic 

 of measles, is said to be remarkable for its excessive luxuriance, 

 formation, and detachment of the epithelium of the mouth 

 (pavement-epithelium), together with mucous corpuscles and oil- 

 globules without fungi ; the second form of soor consists of real 

 thrush. Reubold saw the first form only once during an epidemic 

 of measles, and he describes it quite correctly as " Stomatitis mor- 

 billosa" This stomatitis formed on the lips and the parts of the 

 gums which correspond to them, more rarely on the tip of the 

 tongue, a thin layer of white, small gritty discharge, accompanied 

 by pain, inflammation, and swelling of these parts. The dis- 

 charge fell off without causing ulceration, and exhibited cor- 

 puscles of mucus and pus, without a trace of pseudo-membranes 

 or fungi, besides a plentiful epithelium, and they never occurred 

 on toothless children. It was only after this disease had had its 

 course that thrush-fungus was once observed to break out. 

 Reubold, who recently gave a more correct description of 

 aphthae, and who deserves great merit, alwa3 r s saw the fungus at 

 the very beginning of aphthae. He adopted, however, the French 

 theory, and views aphthae and thrush as two distinct forms of 

 disease. 



EXPERIMENTAL APPENDIX. 



Experiments made by Berg in order to ascertain the most favorable 

 medium for the development of the fungus. 



Berg took scabs of aphthae, weighing two or three grammes, 

 from a living child, and poured distilled water over them, and 

 allowed them to stand at a temperature of 12 15 C. (53 59 

 Fahr.) He found after the lapse of five days numerous sporidia 

 in the liquid, which were larger and more developed and more 

 copious than at the time when the scabs were detached. He 

 also observed that there was a connection between two or three 

 of them, and that their stalks were twice as thick, whilst other 

 fungus-formations were wanting. A similar result was obtained 

 by the experiments for preserving the scabs in a liquid mixed 

 with arrow-root powder at the same temperature. Luxuriant 

 fungous formations were also seen shooting up from the scabs 



