another sign of disapproval of his son's choice of career and studies. Kinsey continued his graduate studies at Harvard University's Bussey Institute, which had one of the most highly regarded biology programs in the United States. It was there that Kinsey studied applied biology under William Morton Wheeler, a scientist who made outstanding contributions to entomology. Under Wheeler, Kinsey worked almost completely autonomously, which suited both men quite well. Kinsey wrote his doctoral thesis on gall wasps, zealously collecting samples of the species. He traveled widely and took 26 detailed measurements of hundreds of thousands of gall wasps; his methodology was itself an important contribution to entomology as a science. In 1919, Kinsey was awarded a ScD degree by Harvard University, and he accepted an academic post in biology at Indiana University. In 1920 he published several papers under the auspices of the American Museum of Natural History in New York City, introducing the gall wasp to the scientific community and describing its phylogeny. Of the more than 18 million insects in the museum's collection, some 5 million are gall wasps collected by Kinsey. Kinsey wrote a widely used high-school textbook, An Introduction to Biology, which was published in October 1926. The book endorsed evolution and unified, at the introductory level, the previously separate fields of zoology and botany. An Introduction to Biology was unlike any other textbook on the market ... Kinsey's textbook was noteworthy for the strong position it took on evolution ... In his textbook Kinsey laid out the basic facts of evolution in a manner-of-fact matter, as though he were discussing the life cycle of the fruit fly. ... The chapter called "Further Evidence of Change" was especially blunt ... Kinsey defined evolution as "the scientific word for change", and while he acknowledged that there are some people who "think they don't believe in evolution", he tried to show his students the folly of such reasoning. To find proof of evolution, students had only to look at things they used daily ... Kinsey ridiculed the man who denounced evolution but owned a new breed of dog or smoked a cigar made from a recently improved variety of tobacco, saying, "When he says he doesn't believe in evolution, I wonder what he means." Kinsey co-authored Edible Wild Plants of Eastern North America, published in 1943, with Merritt Lyndon Fernald. The original draft of the book was written