ice Ce Seen: ce 
. 
1906] FULTON—CHEMOTROPISM OF FUNGI QI 
chemical next to the cover, the spores being distributed in the outer 
layer. The cover was inverted over a stender dish of 36™™ diameter 
containing distilled water, and was sealed with a coating of vaseline 
around the rim of the vessel. 
This method seemed to possess distinct advantages over the one 
with capillary tubes: the numerous perforations made it possible 
to make a large number of observations from a single preparation; 
TABLE III 
5 s S g 2) E 8 4 & 
z g z : Ba<| & 2 Ae |p E 
4 i] no 
ae ea = 
i = a im 
Neutral potassium phosphate, 2 2% ecesas 12 19 24 22 33 ee 
A a s3 20 18 25 36 25 
Monobasic potassium phosphate, 2 2 fe =} ag 22 24 26 36 23 
Ds| 20 26 23 20 25 21 
Dibasic ammonium eS hate, 2 % 13 20 2I 20 15 23 
ane ee 2% ie saped eweaes 49” | 41 34 31 35 Bd 
Phosphorie acid, 6.9 9.06054 less cn ces 48’ | 30 35 39 23 3° 
Malic acid, r 1% AP Serra ali, le te ee x x 24 x 38 x 
e me | day aie et teh tare Oe 21 21 26 21 17 x 
Tartaric acid, 170 per ne Re eae Ne ae pe * 20 43 22 19 18 
5 7  eicaie ee el 25 27 34 25 24 22 
Oxalic acid, 1 es eet er aan x 17 23 x 17 
0 Rcainintt em aaianad Ges 23 22 23 34 II 40 
Cane sugar, 5 $ Yor. iver sSa mew ea eas waa nee 38 32 24 31 a0 48 
BE el. ca pene oe 30 37 20 30 20 55 
. Sp ee ee ere eee ra ee 30 35 24 a2 23 
Glucose, 5 o. Rea Segre Grape igs Dog oa are a 39 39 20 34 30 37 
et Gnic aGere sete ee ce un 40 24 23 39 20 3° 
POPRONE BT Senne 14 28 21 13 20 19 
: eee ais ws Son cs Wee eas ous 26 23 20 21 13 22 
Pepsin active Nig ae ae SSE 24 20 19 42 23 30 
te ; 3 Sey MCLE as pee 25 30 22 27 31 22 
Potced Sopa 2 %.. eee isn neers a6 t.. 37 ah 33) 4 | ee 
Aspa: dy OR analaeee eireeterer acer tty 19 23 30 23 30 15 
be ey ot as 15 23 30 20 30 24 
es sulfate, 0.00 % Nees ae wae aie 9 21 21 25 34 31 
Dibasic sodium phosphate, 2 2% ors uaa? 35 25 26 26 15 20 
mew wees 38 Ki) 27 20 26 a3 
Starch vag Mek. WORE ROT OE Tee 24 20 21 27 25 
te a see ge tree cee . 27 22 20 26 15 
Maltose, 2 2%, Sree ee earn Reena 33 30 22 21 25 14 
pee eect aire e sss 36 29 28 31 30 28 
Control (lestilbad wate @elatin) ©... 5 60s 28 30 29 24 22 18 
Note: gana X indicates that germination was inhibited. Uromyces 
caryophyllinus was tested with the majority of these substances, in the few 
instances in which growth was sufficiently great for a determination, the — 
was practically the same as for the other fungi. 
