SIXTEENTH ORDINARY MEETING. 114/83 
he found this velocity to be 36,707 feet per second, or 253 feet less 
than seven miles. He then showed the effect upon a body so pro 
jected of the rotary motion of the earth, and of the perturbation 
caused by the sun’s attraction, and how these forces combined would 
give such a body exactly the orbit in which the moon actually 
moves. Having also indicated how the permanency of the system 
is ensured, he deduced the conclusion as irresistible that this is how 
the moon was projected into her present orbit. 
Mr. Livingstone took exception to some of the positions of 
the paper, and drew special attention to his doctrine that 
there is no such thing as centrifugal force at all, but that 
orbital motion is only vibration. 
