2 MAY 1914, Page 14

BOTANICAL COLDS.

[To THE EDITOR or Tim "Srscri.ron.-3

Sin,—In your article on "Botanical Colds" last week you do not mention one of the rarer, but quite undoubted, causes of asthma—the duet or effluvia from the coat of the common cat. I say "common" cat because, in the case known most intimately to me, a pure-bred Persian seemed to be quite innocuous, whereas five minutes' proximity to a tabby would produce marked asthmatic symptoms. Rugs and furniture impregnated with the poisonous dust, or even the clothes of visitors who have cats constantly on their knees or about them, are often responsible for starting an attack. This ought to be more widely known, as, in the ease mentioned above, it took years of disastrous blundering before the true origin was found out.—I am, Sir, &c., L. C. P.