The Toepler pump has been modified so that it operates continuously and automatically, maintains a high vacuum, guards completely against the inclusion of air in the exhaust gas, and is easily made by the ordinary chemical experimenter. A water pump at M lowers the mercury in E, F and at the same time draws mercury into K through N. Mercury is raised in E, F by atmospheric pressure through N as soon as the surface of the mercury in U is below the lower end of the tube N. Gas from the apparatus is forced out through F, G into a collection apparatus W. The system P, Q, R, S, T is used only in starting the pump.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
McLaughlin, H. M. and Brown, F. E.
"A Simple Automatic Mercury Pump Which Permits the Collection of the Exhaust Gas,"
Proceedings of the Iowa Academy of Science, 31(1), 288-289.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/83