| Show Q E D ten years ago said eald the professor of mathematics 1 I killed a fly that had got into ray my office if I 1 killed that fly she would certainly have laid fifteen hundred eggs from these theao eggs would have come other flies who would in turn havo have increased and multiplied so BO that by now we should have more hies files obviously they would have made life an inferno therefore it la is certain that by the killing iliof of that fly I 1 did the world a great sor norvice vice new york evening post |