Exit the Cockroach?

THANKS to two insecticides de veloped by the Shell Company, it appears that that standard “prop” of Island novelists—the cockroach-infested trading vessel — will very soon be a thing of the past.

Two powerful insecticides named Aldrin and Dieldrin, mixed with a

lacquer and sprayed onto walls, are guaranteed to render them wholly repellant to cockroaches for up to 2 years. The lacquer slowly exudes very fine crystals of the repellents.

Scrubbing of the walls in no way reduces the potency of the mixture.

The preparation—and the separate insecticides —are now being used in various applications, such as in fly and locust plagues, all over the world with considerable success.