1899] BRIEFER ARTICLES 135 
Table III shows less difference between immediate and delayed 
exposures to the higher temperature. 
In table IV it is again evident that longer exposures were neces- 
sary to kill all of the spores when germination might have begun. 
The limits of growth in table V are very well indicated, and the 
effects of immediate and delayed exposures are for the first time prac- 
tically the same. 
TABLE VII. 
SPORES EXPOSED TO DRY HEAT. 
Exp, no, apo fae Temperature | Successive days Result 
Sass oe apie We 
91 6 hours 51.6 Good growth 
92 rh 54.4 Good growth 
93 ies 54-4 Good growth 
94 IT hour Good growth 
95 6 hours 46.1 2 Good growth 
6 ee 46.1 4 Good growth 
97 : Ee 51.6 | 2 Ten centers of growth 
98 iio 51.6 | 4 | No growth 
Unfortunately the maximum amount of dry heat which the spores 
of this fungus will resist during a single exposure was not ascertained. 
Bel 
Ow are given some results at various temperatures with the 
mycelium of this fungus when grown upon chinch-bugs. 
TABLE VIII. 
MYCELIUM, CULTURES ON INSECTS. 
Sn eal 
Exp. no, Growth ee of |Temperature| Successive Hecak 
Incas or imeexposed| Deg. C, days 
109 Myce! co 6 46.1 New growth on some 
101 & 24 46.1 New growth on some 
102 « 3 46.1 4 New growth on some 
103 « 6 46.1 4 New growth on some 
104 «“ 3 51.6 New growth on all 
105 ‘“ 6 51.6 New growth on some 
106 «“ : 51.6 4 New growth on some 
3 51.6 4 New growth on all 
In t : 
dusteq oe “riments of table VIII, a number of dead bugs were 
abl wit the spores, and in a day or so, when there was consider- 
e€ aerial growth of m 
ycelium along the body sutures, exposures were 
