CHARLES B. WARRING. 151 
rostatic action, for the mass of the rim of our gyrostat 
is many times heavier in proportion, and its speed incom- 
parably greater. I try it over and over, the result is al- 
ways the same. Noamount of skillful management will 
make the instrument stay erect for an instant if it must 
move in a straight line. I submit that this and the 
previous experiments are proof positive that the sustain- 
ing power of a bicycle does not come from the “‘ gyrostatic 
action of its wheel.”’ 
Others find the reason why the Bicycle does not fall, 
in ‘‘its going so fast,’’ referring of course, in a blind 
way to that principle embodied by Newton in his first 
law; ‘‘A body in motion, if left to itself, will continue 
in motion in a straight line’’ for ever. It is true the 
bicycle goes very fast, but does that avail anything in 
solving the problem of its stability ? Let us see. 
It is another principle in physics that two forces act- 
ing at right angles to each other, do not interfere. Each 
produces its own effect as fully as if the other did not 
exist. For example, if a certain force sends a body, D, 
D EG 
north at the rate of 24 feet in a second, and another force 
sends it east 24 feet in the same time, at the end of one 
second it will have gone 24 feet north, and 24 feet east, 
exactly as if each force had acted alone. Going towards 
A B, does not in the least hinder its going towards B 
LOL 
