Killing Mice and Rats
A simple and inexpensive means for killing mice and rats is to leave yeast cakes lying around where they can eat them.
Contributed by Maud McKee, Erie, Pa.
Roller Coaster Illusion Traveling Up an Incline
Car Travels Uphill
A toy car with a paddle wheel and a shaft on both ends traveling upward on a chute in which water is flowing down, is shown in the accompanying sketch. The paddle wheels travel in a reverse direction causing the ends of the axles to roll on the edge of the chute, thus carrying the car up the incline. If a rack is used on each side of the chute and a small pinion on the ends of the axles, a positive upward movement of the car will be obtained.
Contributed by W. S. Jacobs, Malden, Mass.