To the Editor:
—The letter in the May 2, 1953, issue of The Journal (page 77) by Dr. Frank C. Leeming, regarding the possibility of spread of poliomyelitis by fruit flies, recalled to mind a somewhat similar letter in an old medical journal. In an 1811 or 1812 issue of a journal no longer being published, there was a letter to the editor from a physician who set forth his observations on the relationship of yellow fever to the prevalence of mosquitoes. Unfortunately, little attention was paid to that communication, and it was many years and lives later that the cause of yellow fever was definitely established and the disease controlled. It is hoped that observations like Dr. Leeming's will induce a more intensive search for possible insect vectors of poliomyelitis.