sentences:  In 1870 Snow became professor of natural history, and during the next decade he organized the collecting expeditions which resulted in the natural history museum at the university.Snow was the curator of all the natural history collections until 1891, when he hired his former student, Lewis Lindsay Dyche, to curate the zoological collections; the entomological and botanical collections were curated by Snow.Despite an early affinity for botany, Snow's primary research was in entomology.