This illustration diagrams the destructive distillation of wastes by (Cline) Continuous-Feed Process, Agricultural By-Products Laboratory, Ames, Iowa, September 13, 1934
These two rotating cylinder drums are operated by pulleys. On each drum is a spigot and each has a rectangular pan underneath. The drum on the left is smaller than the one on the right.
A graduate student is operating the Potentiometer Facility in the testing of the thermal conductivity of starch as Dr. Tsao and another student look on.