Poison gas is used to rid London's rubbish tips of rats.
Item title reads - Useful use for poison gas. Health and sanitary officials see latest and most efficacious method of exterminating the rat pest. London.
M/S as the poison gas is poured into a small tank with a pipe attached. M/S of four men lined up with their tanks on their backs holding the pipes. C/U of one man, he turns round to show his tank strapped to his back. M/S of them on a rubbish tip, they dig in the holes with the pipe and squirt the gas in. M/S of the men holding up handfuls of dead rats, the camera pans across them