Key West, Fla., Sept. 20, 1897.
To the Editor:
—Will some reader of the Journal having the facilities, administer to dogs, etc., different doses of insect powder and report results? Through an accident to a child it was found to possess probably anthelmintic properties, and I would like to gain some idea of its dosage for homo sapiens, from trials on the lower animals. Insect powder consists of the flowers of Pyrethrum carneum and P. roseum, indigenous to the Caucasian Mountains, but now extensively cultivated in California. It is frequently adulterated and I would ask whoever undertakes this investigation to get a perfectly pure article. The fumes of the burning powder are not poisonous to man, though it causes some confusion of the head in those who sleep in closed rooms where it is used, and the writer has seen in the case of a man sleeping in an apartment