-28- . 
disulfide, and ethylene dichloride to the larvae of Atta genus 
piceus (Oliv. ), and of the first two compounds to the adults, 
were 17.5, 5, 17, 88, 195, 9.5^ and 1.3, mg. per liter, respec- 
tively, and those of methyl "bromide were 5 and 3.1 mg. to larvae 
and adults of Flodia i nterpunctella (Hbn. ), 13 and 7 to larvae 
of Tenebrio obscurus F. and Tineola "bissel l iella (Hum. ), 4.2 and 
4,7 to male and female adults of Zabrot es su bfasciatus Boh., and 
6.5 and 5.4 to adults of Stegobium paniceu m (L.) and Rhizopertha 
dominica (F. ). The insect material used was as nearly uniform as 
possible, most of the larvae being almost full-grown and most of 
the adults fairly young.. ' 
Differences in the speed of action of various fumigants 
against adults of Tri b olium confusum Duv. are shewn on graphs. 
Those exposed to methyl bromide at higher concentrations than 
that necessary for complete mortality seemed normally active 
immediately after the exposure but died within 48 hours. An 
added lethal effect of the low temperature appeared to depend 
on the cold resistance of the particular species concerned. 
The dose required to kill adult Tribolium increased down to 
about 8 °-9 ° C. and then decreased, whereas that necessary to 
kill adults of Sj tophil us granaria (L») increased down to nearly 
0° C. The temperature appeared to have no effect on the flour- 
absorption ratio. 
Baking tests showed no detectable injury to flour fumigated 
for 5 hours at 2 pounds per 1,000 cubic feet. 
STAHL. (112) 
Die Anwendung chemischer Sonder-nassfeuerloscher in den gewerb- 
lichen Betrieben unter dem Gesichtspunkte ihrer Einwirkung auf 
die Benutzer. Zentbl . f. Gewerbe Hyg„ u. Unfallverhutung (n.f.) 
' 5: 78-80, 1928, 
The author takes issue with the recommendation of methyl bro- 
mide as a fire extinguisher liquid by Von Gronorf (40) and quotes 
several authorities to show that its use is dangerous, 
STEIGER, 0. (113) 
Ueber Brommethylvergiftung. Munchen, Med, Wchnschr, 65: 753-755. 
1918. 
A nonfatal caso of methyl bromide poisoning is reported. The 
usual symptoms of dizziness, vertigo, paralysis of the extremities, 
disturbances of vision, etc,, appeared, followed after several days 
by hallucinations and strong motor unrest. The blood contained 
methemoglobin, and blood was excreted through the kidneys. After 
2 months there was a decrease in skin sensitivity in the region of 
the radial nerve in the right hand, with a feeling of "fuzziness," 
and a similar sensation in the right leg. 
