Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 619
about a vertical axis, becomes the generating line of the enveloping hoop above noticed, such a hoopwill of course possess the property of refracting an equally diffused zone of light round the horizon. Fig8302. The difficulty, however, of forming this apparatus appeared so great, that Fresnel…
Mechanical engineering · Mechanics · Engineering
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