A natural philosophy : embracing the most recent discoveries in the various branches of physics, and exhibiting the application of scientific principles in everyday life .. (1899)
Quackenbos, G. P. (George Payn), 1826-1881 · New York, Cincinnati [etc.], American book company · leaf 82
166. Where does the centre of gravity lie in a mans hody ? How may a man increasehis stability ? When attempting to rise from a sitting position, what must a man do ?Why can not a person stoop, if he keeps his heels against a wall ? What does natureteach a man to do, when descending a height? When…
Physics
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