Dallinger slowly increased the temperature of the incubator from an initial 60 °F up to 158 °F. The early cultures had shown clear signs of distress at a temperature of 73 °F, and were certainly not capable of surviving at 158 °F. The organisms Dallinger had in his incubator at the end of the experiment, on the other hand, were perfectly fine at 158 °F. However, these organisms would no longer grow at the initial 60 °F. Dallinger concluded that he had found evidence for Darwinian adaptation in his incubator, and that the organisms had adapted to live in a high-temperature environment.
Dallinger foi incrementando lentamente a temperatura do incubador desde 60 °F ata 158 °F. Os cultivos iniciais mostraron claros signos de distorsión á temperatura de 73 °F, e xa non podían sobrevivir a 158 °F. Ao contrario, os organismos que Dallinger tiña no seu incubador ao final do experimento estaban perfectamente ben a 158 °F. Porén, estes organismos xa non podían crecer á temperatura inicial de 60 °F. Dallinger concluíu que atopara unha evidencia da adaptación darwinista no seu incubador, e que os organismos se adaptaran a vivir nun ambiente de altas temperaturas.