This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1832 Excerpt: ...in some line, as PK, converging toward the other ray, and meeting it in K, the focus. Had one ray diverged from the other, suppose in the line MP, it would, by being refracted toward its perpendicular LB, have been made either to diverge less, be parallel, or to converge. Let the line ID be produced to K; and if the ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1832 Excerpt: ...in some line, as PK, converging toward the other ray, and meeting it in K, the focus. Had one ray diverged from the other, suppose in the line MP, it would, by being refracted toward its perpendicular LB, have been made either to diverge less, be parallel, or to converge. Let the line ID be produced to K; and if the ray had converged, so as to have deacribed the Une NBL, it would then have been coincident with its perpendicular, and have suffered no refraction. If it had proceeded with less convergency toward any point beyond L in the line IK, it would have been made to converge more by being refracted toward the perpendicular LB, which converges more than it; and had it proceeded with more convergency than BL, that is, toward any point between D and L, being refracted toward the perpendicular, it would have been made to converge less. And the contrary happens, when rays proceed out of a denser into a rarer medium, through a concave surface of the denser. For being now refracted from their respective perpendiculars, as they were before toward them, if they are parallel before refraction, they diverge afterward; if they diverge, their divergency is increased; if they converge in the direction of their perpendiculars, they suffer no refraction; if they converge less than their respective perpendiculars, they are to converge still less, to be parallel, or to diverge; if they converge more, their convergency is increased. All which may clearly be seen by the figure, imagining the rays AB, ID, &c. bent the contrary way in their refractions to what they were in the former cases. ExP. Let parallel, diverging, and converging rays pass through a convex lens; the several cases of this proposition will be confirmed. if C DE H be a convex lens, whose axis is IK, le...
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Add this copy of Institutes of Natural Philosophy Theoretical and to cart. $117.00, good condition, Sold by Xerxes Books rated 5.0 out of 5 stars, ships from Glen Head, NY, UNITED STATES.
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Seller's Description:
Boston 1820 3rd American, with improvements, Cummings and Hilliard. With some correcctions, change in the order of the Branches and the addition of an appendix to the astronomical part, selected from Mr. Ewing's Practical Astronomy. 4to., 395pp., full leather with spine label. Several owner signatures, one bookplate, small stamp on title page. Some contemporary neat brown ink notations in text margins. Good, cover rubbed and worn.
Add this copy of Institutes of Natural Philosophy: Theoretical and to cart. $136.00, Sold by Shoemaker Booksellers rated 4.0 out of 5 stars, ships from Gettysburg, PA, UNITED STATES, published by Thomas & Andrews.
Edition:
Thomas & Andrews
Hardcover
Details:
Publisher:
Thomas & Andrews
Language:
English
Alibris ID:
12037469665
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Seller's Description:
No Dust Jacket. 4to-over 9¾"-12" tall. 428 pp. Original brown leather covers w/ gilt title on spine. Corners bumped. Wear to extremities. Binding scuffed. Top front cover is detached 1" from spine. Foxing throughout. Illust. w/ 15 b/w plates.
