16 JULY 1954, Page 14

SIR,-1 certainly seem to have put the cat amongst the

pigeons, which was precisely what I expected.

The anti-tobacco campaign, of which you now have an excellent example, is being waged with the usual fanaticism one attri- butes to any,' anti '- campaign. Its flesh- creeping warnings are on all fours with the old temperance agitations when cirrhotic livers were illustrated as horrid warnings.

I will only reply to the castigation administered to me by your correspondents by observing that, despite strenuous efforts to cause cancerous tumours in animals by painting, inhaling or administering the end- products of smoking, the results have been uniformly negative to date.

Tobacco does not cause cancer. That is the only point I wished to emphasise.--Yours faithfully, M.D. CANTAB. [Name and address supplied.]