Hydrostatical and Pneumatical Lectures |
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abfolute weight afcend againſt alfo almoſt alſo altitude atmoſphere becauſe body capillary tube caufe cauſe column of water common air compreffed condenfed confequently confiderable contiguous defcend defcribed denfity difference diminiſhed diſtance eafily endeavour equal bulk exhauſted experiment expreffed faid fame fcale fecond feemed feveral fhall fhew fhould fide filver fince fiphon firft firſt fluid folid fome force fpace fpecifick gravity fpirit fuch fufficient fufpended fuftained fuppofe fure furface fyringe geometrical progreffion glafs glaſs greater heat heavier immerfed inches increaſed itſelf leaſt Lect leffer lefs leſs lighter liquor magnitude meaſure mercury moſt muft muſt obferved orifice perpendicular phænomena philofophers plane plate polished plates preffed preffure propofed proportion pump purpoſe quantity of air quickfilver raiſed rarefaction rarefied reafon receiver reft ſcale ſeem ſeen ſeveral ſhall ſmall ſpace ſtandard thefe themſelves theſe thofe thoſe Torricellian underſtand upper furface uſe vacuo veffel whofe whoſe
Popular passages
Page 236 - Eflex, rifes and fwells by the meeting of the two contrary tides of flood, whereof the one comes from the SW along the channel of England, and the other from the north, and on the contrary...
Page 232 - 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 233 - ... and confequently the mercury muft ftand high, as often as thefe winds blow. This holds true in this country, but is not a general...
Page 230 - That in ferene, good, fettled weather, the mercury is generally high. " 3. That upon very great winds, though they be not accompanied with rain, the mercury finks lowed of all, with relation to the point of the compafs the wind blows upon.
Page 231 - The mercury's 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...
Page 235 - But those that shall consider how, when once an impetus is given to a fluid body, it is capable of mounting above its level, and checking others that have a contrary tendency to...
Page 232 - 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. " 3. The Mercury finks the loweft of all by " the very rapid Motion of the Air in Storms