An Experimental Inquiry on Some Parts of the Animal Structure

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J. Walthoe, 1740 - 304 pages
 

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Page 237 - This amounts to the same with saying, that, in the case before us, the sine of the angle of incidence is to the sine of the angle of refraction in a given ratio.
Page 220 - ... another in a given Proportion. 2. The proportion of the Sine of Incidence to the Sine of Refraction of one and the same sort of Rays out of one Medium into another, is composed of the Proportion of the Sine of Incidence to the Sine of Refraction out of the first Medium into any third Medium, and of the Proportion of the Sine of Incidence to the Sine of Refraction out of that third Medium into the second Medium.
Page 99 - All the real true knowledge we have of Nature is intirely experimental, insomuch that, how strange soever the assertion seems, we may lay this down as the first fundamental unerring rule in physics, That it is not within the compass of human understanding to assign a purely speculative reason for any one phaenomenon in nature...
Page 221 - Sines, it will be found, that the Sine of Incidence is to the Sine of Refraction out of the Aqueous Humor into the Cryftalline, in the proportion of 21 to 20 very nearly.
Page 239 - For seeing the sine of the refracted angle is to • — ^— * the sine of the angle of inclination, whatsoever "ine°of the In!

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