A Compendious System of Natural Philosophy: With Notes Containing the Mathematical Demonstrations, and Some Occasional Remakrs. In Four Parts ...S. Harding, 1744 |
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A Compendious System of Natural Philosophy: With Notes Containing the ... John Rowning Keine Leseprobe verfügbar - 2017 |
Häufige Begriffe und Wortgruppen
afcend againſt alfo alſo Angle of Incidence Angle of Refraction arife Atmoſphere Attraction Aurora Borealis Bafe Barometer becauſe Body Cafe Caufe Cauſe Center of Ofcillation Chap Column confequently converge convex Lens Cycloid defcend defcribe Degree demonftrated denfer Medium Diameter Diſtance diverging Rays Earth Elafticity equal exprefs faid fall fame farther fecond feem fhall fhould fince firft firſt Fluid fmall Focus fome fometimes Force fpecifically fuch fufficient fufpended fuppofe Gravity increaſed itſelf laft lefs Lemma Lens leſs Line Mercury Motion move muft muſt Number obferved Object oblique oppofite otherwife parallel Rays Particles Pendulum perpendicular perpendicular Height Phænomena Philofophers Place preffed Preffure Propofition Proportion Quantity of Matter raiſed rarer Medium Rays paffing Reaſon Refiftance refpective refracted Ray reft reprefented Retina rife ſeen Side Sine ſmall Space Surface thefe themſelves theſe thofe thoſe tion Tube Unifon Vapours Veffel Velocity Vibrations Water Weft Weight whofe Winds
Beliebte Passagen
Seite 23 - 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.
Seite 97 - 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.
Seite vi - 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 97 - ... 1. The rising of the mercury presages, in general, fair weather, and its falling foul 'weather, as rain, snow, high winds, and storms.
Seite 79 - ... which being once filled, all the overplus of water that comes thither runs over by the lowest place, and breaking out by the sides of the hills forms single springs...
Seite 91 - ... high, as long as the winds continue fo to blow; and then the air being fpecifically heavier, the vapours are better...
Seite 89 - Oblervations at St. Helena^ make very little or no Variation of the Height of the Mercury in all Weathers. Hence I conceive, that the principal...
Seite 121 - In some places the time of the change is attended with calms, in others with variable winds. And it often happens on the...
Seite 98 - That it is not fo much the height of the mercury in the tube that indicates the weather, as the motion of it up and down: wherefore...
Seite 148 - ... reddish Cloud was swiftly propagated along the Northern Horizon, into the NW and still farther Westerly; and immediately sent forth its Rays after the same manner from all Parts, now here, now there, they observing no Rule or Order in their rising. Many of these Rays seeming to concur near the Zenith, formed there a Corona, or Image which drew the Attention of all Spectators...