Spiders' Eyesight

Hov? lar away can a spider see a fly? After several years of ingenieras experiruenting Mr. and Mrs. Peckharn, the naturalista, have concluded that thü greatest average distance at which spiders are able to see objeets distinctly is about one foot. Beyond that distance, then, we may assume that a fly caught in a spider's web would be safe frota detection by its euemy if its movements and struggles toget awaydid not betray it. The same observers think that spiders have the senses of color and