1921] 
ARMSTRONG—SULPHUR NUTRITION IN THE FUNGI, THIOSULPHATE 257 
TABLE XI 
GROWTH AND RELATIONS OF CERTAIN FUNGI ON MEDIA CONTAINING .6 
PER CENT SODIUM THIOSULPHATE. INITIAL Pg 5.9. EXPERIMENT 18 
, Cc. Per cent 
Fungus Days Dry wt.) Final N/100 Na:S:0; HS Sul- | 8p dd 
(gms. ) Pn ibdine | decomposed phate | lation 
4 *950| 2.1 5.5 74.3 1 + 0 
6 PAPA 200 1^ 1:7 0.6 97.2 1 + 1 
A. nig 9 *.9742| 2.0 0.4 98.1 1 + 1 
: : 12 *.,0248| 2.2 0.3 98.6 1 T 2 
15 + 8836| 2:2 0.2 99.0 1 + 2 
18 |*1.1650| 2.3 0 100 1 ae 3 
4 .0785| 5.6 16.4 23.3 1 + 0 
if .1855| 4.9 12.9 39.7 1 + 0 
P. cyel. 9 .4904| 3.8 12.4 42.0 2 + 0 
; 12 .5166| 3.8 7.6 64.4 2 + 0 
15 .5671| 4.1 5.2 74.7 2 + 0 
18 Oli 4.2 2.5 88.3 3 m 1 
1 *.1208| 5.4 19.3 9.8 1 + 0 
7 .d920| 3.5 12.4 42.0 1 + 2 
Hus 9 0415 3.5 Sot 62.1 1 + 2 
i : 12 1.0472| 2.8 4.0 81.3 1 + 4 
15 .0991| 2.6 3.4 84.1 1 ob 4 
29 .8423| 3.4 0 100 1 + 4 
Control 5.9 21.4 0 - 
* 2 cultures only. 
solutions, Aspergillus attaining this growth very rapidly with a 
change in the reaction to Py 1.7 on the seventh day. The rapid 
increase of growth of Aspergillus to the seventh day followed by 
a decline and a second maximum on the eighteenth day when the 
thiosulphate had disappeared did not occur in other cultures, 
so that the significance of this is not known. The unit of oy 
weight per unit of thiosulphate decomposed was practically the 
same for Aspergillus and Botrytis, with Penicillium exhibiting a 
variable ratio as shown in fig. 5. Penicillium was the strongest 
producer of H,3 though the total quantity of thiosulphate de- 
composed was less than for the other organisms employed. 
