An apparatus giving a continuous record of the number of honey bees leaving and entering a hive is described. Bees pass through a trap, producing electrical impulses. The recording part consists of a magnetic escapement causing a cursor carrying a type figure to travel above the paper. At regular time intervals the position of the cursor is printed, and it is brought back to the zero position. This recorder may find application whenever it is desired to record continuously a rate of impulses.
No takes yet. Share an insight, caveat, or question.
A. C. Fabergé (1943) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: