To the Editor of the "Norru-Ciano Darcy News"
Sin—With at least two more months of the mosquito nuisance to be faced, perhaps some of your readers would welcome the formula for an economic al spraying mixture. The two most widely distributed brands are retelling currently at $9.79 per gallon; much higher if bought in lesser quantities. A spray as effective as anything on the market can be made as follow Atal, Kerosene.....sssssss.;+ $030 scores being 72 and 46. 11."
pyrethrum "eaves" (powder Laz. all of pennyroyal Saving per pennyroyal (both obtainable from feshufled, Through the Recs 'Tyros chemists) in the kerosene; stand for at least 48 hours, stirring occasionally; strain through' a cloth and the spray is ready for use.
Incidentally, either ground. pyretbruin leaves' or pyrethrum seed powdered, used dry, is an excellent insecticide, for use against ants, cock-ranches, etc. One of the other—leaves or seed—is the main ingredient (in some cases the only ingredient) of trade-marked insect powders, most of which sell at prices out of all proportion to their basle cost.
Shanghai, July 6.
Text read from the printed page and cleaned; old type leaves the occasional error.