The book of philosophical experiments, illustrating the principal facts and curious phenomena of electricity, galvanism, magnetism, optics, chemistry, heat, etc., with introductory observations of each science, and upwards of 300 experiments (1839)
Dalton, J. S. (John S.) · New York : [s.n.] · leaf 32
ht was not one color, ashad previously been supposed ; and its composi-tion may be pleasingly illustrated in the follow-ing manner :—Paste a sheet of white paper on acircular piece of board, about six inches in diam-eter, and divide it, with a pencil, into fifty parts(see cut). Then paint a… … fainter at the edges, till they mix with the oneadjoining. If the board be then fixed on an axle,and made to revolve quickly, the colors will nolonger appear separate and distinct, but becominggradually less visible, they will ultimately appeartt>f)i!c, giving this appearance to the whole…
Physics
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