222 VEGETABLE PAEASITES. 



was strongly alkaline. This reaction lasted for three days, the 

 liquid remained clear and without gas. On the fourth day, the 

 liquid was slightly acid, which went on increasing as well as the 

 evolution of gas; oil the sixth and seventh days, fresh sporidia 

 appeared. To the other half more sugar was added, gas was 

 evolved, and the fungi continued to increase ; on the fourth day, 

 however, the whole action ceased. The gas which was evolved 

 was found to be carbonic acid gas by passing it through lime- 

 water. The acid which formed after the evolution of carbonic 

 acid gas had ceased appeared to be acetic and lactic acids. 1 



I may, in conclusion, mention the questions which Reubold 

 puts at the end of his article, and which are to be decided experi- 

 mentally. 



1. Does the fungus pertain only to man? 



2. Is it a separate distinct species or only modified by its 

 local seat ? 



3. Are mucous membranes the only favorable soil? 



4. What are the conditions of its growth and the results of 

 the decomposition which accompanies it ? Is it an acid ? 



5. Do different kinds of fungi occur in thrush, or are the 

 various distinctions caused by external influences? 



6. Can other fungi produce a similar disease of the mucous 

 membrane ? 



7. Does a particular kind of gas (marsh-gas) favour its de- 

 velopment ? or a particular season of the year ? (Reubold thinks 

 that the fungus is of more frequent occurrence in summer, as is 

 also the case with summer-diarrhoea.) 



8. Are warm, wet summers in favour of the fungus ? 



Literature. 'The principal work is that of Berg of Stockholm, 

 f Ueber die Schwammchen von Kindern/ translated by van dem 

 Busch, 1848 ; Berg, in Miiller's Archiv/ 1842, p. 291 ; ' Hygea/ 

 1842, 12 Hft.; Gruby, ' Compt. rend./ 1842, xiv, p. 634, and *1 844, 

 xviii, p. 585 ; * Clinique des hopitaux des enfans/ 1842 ; ' Annal. 

 d'Anatomie et de physiol. pathol./ 1846, p. 286; Vogel, 'Allg. 

 Zeitung fur Chirurgie, innere Heilkunde, &c./ 1842 ; ' Gaz. med. 

 de Paris/ 1842, p. 234 ; ( Allg. pathol. Anatomic und ihre Ueber- 

 setzung durch Jourdan / ' Icon. path, hist.' 1843, tab. xxi, 

 1 3; Eschricht, Froriep's ' Notizen/ 1841, No. 134; Hannover, 

 Miiller's 'Archiv/ 1842, p. 290; Hoernerkopf, 'Dissert, de aph- 



1 Appendix C. 



