A Compendious System of Natural Philosophy: With Notes, Containing the Mathematical Demonstrations, and Some Occasional Remarks: in Four Parts, Volume 1

Front Cover
Sam. Harding, 1753
 

Other editions - View all

Common terms and phrases

Popular passages

Page 19 - 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 93 - In foul weather, when the mercury rises much and high, and so continues for two or three days before the foul weather is quite over, then expect a continuance of fair weather to follow.
Page 87 - The greater height of the barometer is occafioncd by two contrary winds blowing towards the place of obfervation, whereby the air of other places is brought thither and accumulated ; fo that the incumbent cylinder of air being...
Page 87 - 2. The greater height of the barometer is occasioned by two contrary winds blowing towards the place of observation, whereby the air of other places is brought thither and accumulated...
Page 87 - High, as long as the Winds continue fo to blow, and then the Air being fpecifically Heavier, the Vapours are better kept...
Page 30 - The sine of the angle of incidence bears to the sine of the angle of refraction a ratio, which is always the same for the same two media and is called the index of refraction.
Page 85 - A fecondcaufe is the uncertain exhalation and precipitation of the vapours lodging in the air, whereby it comes to be at one time much more crouded than at another, and confequently heavier ; but this latter in a great meafure depends upon the former.
Page 23 - Whatever the obliquity of the incident ray, the ratio which the sine of the angle of incidence bears to the sine of the angle of refraction is always constant for the same two media, but varies with different media.
Page 89 - In calm frofty weather the mercury generally ftands high, becaufe (as I conceive) it feldom freezes but when the winds come out of the northern and north-eaftern quarters, or at leaft unlefs thofe winds blow at no great diftance off ; for the northern parts of Germany, Denmark, Sweden, Norway, and all that tract from whence north-eaftern winds come...
Page 8 - Courfe, becaufe the Attraction of the Particles of the upper Medium being in a contrary Direction to that of the Attraction of thofe in the lower one, the Attraction of the denfer Medium will in fome Meafurc be deftroyed by that of the rarer.

Bibliographic information