A Compendious System of Natural Philosophy: With Notes, Containing the Mathematical Demonstrations, and Some Occasional Remarks. In Four Parts ... |
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Account acquire acts alfo Angle appear Arch Attraction Bafe Barometer bears becauſe becomes Body Cafe called Caufe Center Chap Circle Column common confequently confidered continually contrary convex defcend defcribe Diameter direction Diſtance diverging drawn Earth Effect equal Experiment fall fame farther fince firft fixed Fluid fmall Focus follows fome Force Form former fquares fuch fuppofe given Gravity greater half hence Inch Incidence laft larger Laws lefs Length Lens Light Line lower Manner Matter Medium meet Mercury Motion move multiplied Nature obferved Object paffing parallel Particles Pendulum perpendicular Philofophers Place Plane Point Portion Power preffed Preffure proceed produced Propofition Proportion Quantity raiſed Ratio Rays Reaſon Refraction reft reprefented rife Side Sine Situation Solid Space Surface thefe theſe thofe thoſe tion Tube Vapour Variation Veffel Velocity Vibrations Water Weight whence whole Winds
Popular passages
Page 83 - When foul weather happens soon after the falling of the mercury expect but little of it ; and on the contrary, expect but little fair weather when it proves fair shortly after the mercury has risen.
Page 77 - Va" pours are better kept fufpended, fo that they " have no Inclination to precipitate and fall " down in Drops, which is the Reafon of the " ferene good Weather which attends the " greater Heights of the Mercury.
Page 76 - being low inclines it to rain, becaufe the air being light, the vapours are no longer fupported thereby, being become fpecifically heavier than the medium wherein they floated ; fo that they defcend towards the earth, and in their fall, meeting with other aqueous particles, they incorporate together and form little drops of rain. But the mercury's being at one time lower than...
Page 75 - Oblervations at St. Helena^ make very little or no Variation of the Height of the Mercury in all Weathers.
Page 107 - In some places the time of the change is attended with calms, in others with variable winds. And it often happens on the...
Page 7 - 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 83 - These are esteemed the best of any general rules hitherto made : 1. The rising of the mercury presages, in general, fair weather; and its falling, foul weather, as rain, snow, high winds, and storms. 2. In very hot weather, the falling of the mercury indicates thunder.
Page 83 - 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 66 - ... again meeting in one common valley, and gaining the plain ground, being grown less rapid, become a river; and many of these being united in one common channel, make such enormous streams as the Rhine, the Rhone and the Danube.
Page 18 - 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.
Bibliographic information
| Title | A Compendious System of Natural Philosophy: With Notes, Containing the Mathematical Demonstrations, and Some Occasional Remarks. In Four Parts ... Volume 1 of A Compendious System of Natural Philosophy: With Notes, Containing the Mathematical Demonstrations, and Some Occasional Remarks. In Four Parts, John Rowning |
| Author | John Rowning |
| Publisher | Sam. Harding, 1758 |
| Original from | the University of Michigan |
| Digitized | 29 Jun 2007 |
| Length | 45 pages |
| Export Citation | BiBTeX EndNote RefMan |