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Seite 707 - When a ray of light passes from one medium to another, it is refracted so that the ratio of the sine of the angle of incidence to the sine of the angle of refraction is equal to the ratio of the velocities in the two media.
Seite 169 - It is better, on this account, in graduating the bottle, to make two scratches as represented in the drawing, one at the top and the other at the bottom of the curve : this prevents any future mistake.
Seite 756 - A new edition, with numerous illustrations; together with a general history of the Horse; a Dissertation on the American Trotting Horse ; how Trained and Jockeyed; an Account of his Remarkable Performances; and an Essay on the Ass and the Mule.
Seite 102 - When a perfectly elastic body strikes a hard surface and rebounds from it, the angle of incidence will be equal to the angle of reflection, and.
Seite 534 - When a ray of light passes from a rarer into a denser medium, it is bent towards the perpendicular, and from a denser into a rarer from the perpendicular, which is by no means generally true.
Seite 760 - First American edition, with a Glossary and other Additions and Improvements; from the second English edition. Translated from the sixth German edition, by HENRY MEDLOCK, FCS, &c.
Seite 228 - ... the water in the cistern. This ball is connected with a lever acting upon some part of the machinery, which controls the power or regulates the amount of resistance, as already explained in the case of the governor.
Seite 764 - A SELECTION OF ONE HUNDRED PERRIN'S FABLES, ACCOMPANIED BY A KEY, Containing the text, a literal and free translation, arranged in such a manner as to point out the difference between the French and English idiom, &c., in 1 vol., 12mo. A COLLECTION OF COLLOQUIAL PHRASES, ON EVERY TOPIC NECESSARY TO MAINTAIN CONVERSATION...
Seite 357 - The following rules may to some extent be relied upon, but even these are subject to much uncertainty. 1. Generally the rising of the mercury indicates the approach of fair weather, the falling of it shows the approach of foul weather. 2. In sultry weather, the fall of the mercury indicates coming thunder. In winter the rise of the mercury indicates frost. In frost, its fall indicates thaw, and its rise indicates snow.