1916] LINK—FUSARIUM 205 
solution. N/100 proprionic acid was toxic to both, while both 
grew in N/250 solution. N/250 butyric acid was toxic to F. tri- 
chothecioides, while F. oxysporum grew in it. 
TABLE IX 
DRY WEIGHT (IN MILLIGRAMS) FORMED IN 12 DAYS IN VARIOUS CONCENTRATIONS 
FUSARIUM OXYSPORUM FUSARIUM TRICHOTHECIOIDES 
N/rooo | N/soo | N/2s0 | N/125 | N/1000 | N/soo | N/250 | N/r25 
Formic acid 
Non- | Non- | Non- | Non- | Non- 
| We set nae a weigh- | weigh- | weigh- | weigh- | weigh- | None | None | None 
able able able able able 
fe) 
11 ey eee weigh- | weigh- | weigh- | weigh- | weigh-| “ Y i, 
abl able bl able 
POVINMRE, ies cle ee ee ale eee ee 
Acetic acid 
| GE IG EES) ae Gian ile ON dn ea 0.8 t\2 3.2 5.8 
BE ees hee, a ee a 0.8 2 ah 6.6 
PUETEOE ode ie og ee eG og 0.8 1.6 3:3 6.2 
Proprionic acid 
ey ee 1.4 2.0 $.0 | None | 2.4 2.6 4.0 | None 
Cueueeicen: 2.6 2.4 5.8 : +s 3-4 6.6 - 
Average....| 2.0 2.2 oy oy eee 153 3.0 Car tae Hero 
Butyric acid 
ee ae ae 4.8 7.6 | 10.4 | None | 2.4 5.0 | None | None 
Sige cg ana oe 9.0 ae 7 3.6 5.6 - i 
Average..../ 5. ING es io ae 3.0 Cat ce Ree Danae 
Oxalic acid 
on on * 
tee a 0.4 0.4 0.4 +2 0.8 | weigh- | weigh- | weigh- 
abl able able 
on- | Non- 
2 ee 0.8 ¥.2 1.2 3 0.8 | weigh-| weigh-| 0.2 
able able 
Average....| 0.6 0.8 0.8 1.2 OB? licssceolexscues o.1 
A set of experiments was run also in which solanin in various 
percentages was added to glucose media. Because of the high 
cost of solanin, only 1 cc. solution was used in each test. The 
results are given in table X. 
These differences, that is, greater versatility in the use of carbon 
sources, greater resistance to inhibition, and intoxication, may well 
