Edward Scripture, The New Psychology (1897): [1]. The original 1882 experiment was cited as: Sedgwick, "On the Variation of Reflex Excitability in the Frog induced by changes of Temperature," Stud. Biol. Lab. Johns Hopkins University (1882): 385. "in one experiment the temperature was raised at a rate of 0.002 °C. per second, and the frog was found dead at the end of 2½ hours without having moved."
