No. IX.—THINGS ARE NOT WHAT THEY SEEM
It is difficult, even after measurement, to believe that these figures are of the same size.
But they will stand the test of measurement.
A CLIMBING MONKEY
11. A rope passes over a single fixed pulley. A monkey clings to one end of the rope, and on the other end hangs a weight exactly as heavy as the monkey. The monkey presently starts to climb up the rope. Will he succeed?
GAINING GROUND
12. Seeing that the tension on a pair of traces tends as much to pull the horse backward as it does to pull the carriage forward, why do the traces move on at all?