Infection of Human and Simian Tissue Cultures with Rous Sarcoma Virus.

cell within each layer, while a heat flux from below produces a smaller scale turbulent motion. The interfacial phenomena described here are also somewhat similar to the "interfacial turbulence" observed by chemical engineers during the process of solvent extraction (Sherwood and Wei4), but the mechanisms are quite different. All their observations relate to the boundary between immiscible solvents, and the motion near such interfaces has been explained in terms of the variations of surfa( tension with concentration or temperature.