1921] 
ARMSTRONG—SULPHUR NUTRITION IN THE FUNGI, THIOSULPHATE 275 
(97). These globules and crystals give the reactions and have 
the appearance of sulphur, and they show that these fungi can, 
under certain conditions, accumulate sulphur in the mycelium as 
Dry wt. 
Cams. Py 
100 7 2 
80 3 
60 4 
/ N 
" » 
/ TN 
40 wd 5 
Jd / 
— 
20 fá 6 
0 7 
o 
4 8 Days 12 16 20 
Fig. 20. Penicillium cyclopium on solution of initial Px 5.5 con- 
taining magnesium sulphate. 
in the case of the filamentous sulphur bacteria. The solubility 
of the globules in carbon bisulphide, ether, and chloroform, and 
their insolubility in hydrochlorie acid, absolute alcohol, hot 
alkali (KOH), glacial acetic acid, nitric acid, benzol, and benzol 
after treatment with absolute alcohol, indicate that they are 
sulphur. 
