HC Deb 13 July 1917 vol 95 cc2284-5
25. Mr. LYNCH

asked the Under-Secretary of State for War whether a range-finder was in use during the air raid over London; and, if so, whether the guns were pointed according to its indications?

Mr. MACPHERSON

It is not considered advisable to give public information as to such details of the defences.

Mr. LYNCH

Is not the test of a range-finder its use in action? Has this range-finder any use? Is it a real range-finder or only a political toy?