—9- 
the fumigation chamber. The ratio of the median lethal concentra- 
tion (M.L.C.) with flour to that without flour equals the absorp- 
tion ratio, which is 2. The M.L.C. of methyl bromide for Tribolium 
after GO minutes' exposure at 25° ir. the presence of various food- 
stuffs and at various pressures follows: (l) Atmospheric pressure: 
empty flask 32.5, raisins 28.1, wheat 30.4, flour 50.0; (2) 240-mm. 
pressure: Empty flask 16.8, •wheat 17.2, flour 34.0; (3) 30-mm. 
pressure: Empty flask 11.4, raisins 12.6, wheat 14.2, flour 26,0. 
The toxicity of methyl bromide is affected by temperature about as 
much an is that of carbon disulfide and less than that of chloro- 
picrin. Methyl bromide is more effective on insects in the pres- 
ence of moisture. The germination of corn, wheat, oats, barley, 
beans, and field pea seeds is not affected by fumigation with 
methyl bromide. 
FLORET. (30) 
TQinischer Beitrag zur gewerblichen Brcmmethylvergiftung. Zentbl. 
f. Gewerbe Hyg. und Unfallverhutung. 3: 146-1497 1915. 
Three nonfatal cases cf poisoning by methyl bromide are re- 
ported. A period of 4 to 6 weeks was required for recovery. 
Clinically, three stages were observed in the course of the ill- 
ness: (l) Prodromal stage with dizziness, visual disturbances, 
disturbance of equilibrium, reeling gait; (2) stage of psychic ex- 
citement with delirium, delusions, convulsions, unconsciousness, 
coma; (3) appearance of nervous weakness (hypochondria, melan- 
cholia, hystero-neurasthenia), which may last for years. 
FLURY, F., and ZANGGSR, K. (31) 
Lehrbuch der Toxikologie fur Studium und Praxis, 500 pp. 
Berlin. 1928. 
Symptoms of methyl bromide poisoning are briefly reviewed. 
There is o. typical interval of several hours or days before the 
onset of severe symptoms (p. 206), 
and ZERBHC, P. (32) 
Schadliche Case, Dampfe, Ilebel, Pauch-und Staubarten. 637 pp. 
Berlin. 1931. 
The action of methyl bromide as a nerve poiscn is probably duo 
tc decomposition to form methyl alcohol or formaldehyde (pp. 309-310) 
MC0LINI, J. DE. (33) 
L'emploi du bromure de methyle pour le traitoment des graines do 
semenoe. Rev. de Path. Veg. et d'Ent. ;.gr. de France 22: 1-8. 
1935. 
In experiments in Lorocco in February 1934, 100 percent mor- 
tality of all stages of Si tophilus cryz a (L.) and of a small num- 
ber of S. granarir (L.) infesi g obtained by exposure 
to methyl bromide at the rate of 2 ounces per 100 cubic feet at 
19.5° C. At first the weevil .ctivc, but activi' 
gradually diminished until after about 6 hours all movement ceased. 
In further tests 100 percent mortality of th Lts of S. oryza 
was obtained with the same amount of fumigant by exposin i 2 
hours in glass tubes closed with muslin under bell jars at 22° C, 
