The lectometer is a special form of tachistoscope which provides a connection with a chronoscope. Through an open, adjustable sector of a rotating disc is presented material for reading. Just as the view is shut off a small arm attached to the spindle of the disc dips into mercury, thus completing an electric circuit which sets the chronoscope into action. The observer reads into a voice key which stops the chronoscope and gives the time to the thousandth of a second it takes him to know and say what he had observed during the short view.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
Finkenbinder, E. O.
"New Measurements in the Process of Reading,"
Proceedings of the Iowa Academy of Science, 31(1), 403-404.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/137