A number of simple lecture experiments were demonstrated. These dealt mainly with inexpensive apparatus and had to do in the main with transformer circuits when the secondary was first open and then closed.
Proceedings of the Iowa Academy of Science
©1938 Iowa Academy of Science, Inc.
Eldridge, John A.
"Several Simple Lecture Experiments,"
Proceedings of the Iowa Academy of Science, 45(1), 207-207.
Available at: https://scholarworks.uni.edu/pias/vol45/iss1/48