USS Squalus which went down in 1939. Hildebrand won virtually every major prize in the field of chemistry except the Nobel Prize. The American Chemical Society created the Joel Henry Hildebrand Award in his honor for work pertaining to the field of theoretical and experimental chemistry of liquids. The first award was presented to Hildebrand himself in 1981 as part of the observances of his 100th birthday. He has been identified by Kantha in 2001, as one of the 35 centenarian scientists who belonged to an unusual cluster that was newly formed in the 20th century. Hildebrand often said he most cherished his role as a teacher. In an interview conducted shortly before his 100th birthday, he observed: "Good teaching is primarily an art, and can neither be defined or standardized ... Good teachers are born and made; neither part of the process can be omitted." He remained committed to working with undergraduate students even at the age of 100. He came to his office on campus nearly every school day until declining health made it impossible. Hildebrand was also active in the Sierra Club, and was its president from 1937 through 1940. As a member he contributed to many important land-use reports about State and National Parks in California. He also managed the 1936 US Olympic Ski Team. Scientific contributions His study of the solubility of non-electrolytes led to his formation of the "Hildebrand solubility parameter" The general idea is that a potential solute will be soluble in a solvent with a comparable value for . This work was then used in the formation of the more comprehensive "Hansen solubility parameter", which accounts not just for dispersion interactions between solvent and solute (as the Hildebrand parameter does), but also for hydrogen bonding and polar interactions – thus lifting the restriction of application to just non-polar species. Hansen shows great respect for Hildebrand and his work and indeed acknowledges that his work of the Hansen solubility parameter would not have been possible without the great contribution that Hildebrand made to this field. Hildebrand was also outspoken on the manner in which small non-polar species exist in water. The dissolution of species such as methane in water is accompanied by both a negative enthalpy and a negative entropy. A common model for this behavior is the iceberg- or clathrate-type model, in which a network or cage of hydrogen-bonded water develops around