THE SCIENTIFIC WORK OF DR. CHARLES 

 HENRY TURNER* 



During liis lii'otiiiR', Di-. Turner ijublished about fifty 

 treatises on Neurology, Invertebrate Ecology, and Ani- 

 mal Behavior. In addition to these, he wrote, for a num- 

 ber of years, reviews of the literature on Com])arative 

 Psychology in liie rsychologicai Bulletin an<l in The 

 Journal of Animal l>ehavior. Tiiis alone is an index of 

 the esteem in which scientists in his own line regarded 

 bis work. 



His first work was published in 189l! in the Journal of 

 Comi)arative Neurology. A few years later an impor- 

 tant volume on Tiie Entomostriea of Minnesota was pub- 

 lished jointly with Ilerrick. In this r)0()-i)age treatise, 

 with eighty-one plates, many new species were described 

 and much attention was paid to the ecology of these 

 creatures. 



Then, suddenly, his attention was turncil from the 

 microtome, and he produced a most interesting series of 

 experimental investigations on the behavior of insects. 

 His researches on homing, on reaction to light, on death- 

 feigning, on tro]nsms, have cleared up some of the most 

 perj)lexing ]iro])lems of comparative psychology and have 

 thrown new light on the subjects of the interrelations of 

 tropisms, instinct, ami what may, to a certiiin extent, be 

 called intelligence. 



But most interesting of all was his technique of experi- 

 menting. Dr. Turner spent much thought on his method 

 of work before he ever went into the field, ami there with 

 ingenious devices, some simple, some intricate, he solved 



•Paper rend at tlic nuinorial tn Dr. Cliarlcs II. Tiitiii.T, at Sunnier 

 High School, Mny 25, 192.3. 



