Die Parasiten der Infectionskrankheiten. 29 
3) Cultivation on the surface of a cork, disinfected by sub- 
mersion in alcohol for an hour. Till now the result is the forma- 
tion of the same sclerotia, and just now the cells of them begin 
to germinate. 
4) Cultivation on the surface of a potato (the skin cut off). 
Till now only vast augmentation of the micrococci. 
5) Cultivation in a solution of sugar and phosphate of am- 
monium. (The apparatus I have not yet opened.) 
6) Cultivation on albumen of eggs, with a small portion of 
sugar solution. Great apparatus (Grosser Isolir-Apparat) [Gährungs- 
erscheinungen p. 14 Fig. 2]. This cultivation has the purpose 
of discovering the brand form (anäerophytische Morphe) of the 
fungus, an may require two months’ time. 
Ihave already succeeded in discovering three forms of the fungus: 
1. Schizosporangium. 
. Aérophytic spores (ripe), mature. 
. Aérophytic spores*) (unripe) immature or „mold“ form. 
There still must be discovered three other forms of the fungus: 
1. The unripe form of the schizosporangia**) (mucor or mold). 
2. The anäerophytie spores (ripe) ***. 
3. The anäerophytie spores (unripe), Oidium form 7+). 
As soon as I succeed in getting any more results I shall 
write to you. I hope you still succeed in getting the same forms 
in your cultivations. 
Meinem Brief fiigt Herr Professor Harris die nachfolgenden 
Bemerkungen bei: 
Manifestly it is not a common and familiar form of oidium 
or penicillium that Dr. Stiles and Prof. Hallier have been 
studying, or they would quickly have recognized and named 
these beautiful fungi. The fact is instructive that in the 
cool weather of October. we were able to send a specimen of the 
infected bile from New-York to Jena, four thousand miles, wi- 
thout change, and with the spores alive, and evincing all the ca- 
pabilities of higher development into plant-like forms. 
It is not the present habit of science to depend upon hypo- 
eo bo 
*) Es muss hier eigentlich heissen: Aérophytic Conidia s. A&roconidia. 
**) Also die Thecaconidien. 
*#%) Anäeroconidien. 
+) Anäeroconidien. 
