Transactions of the American Philosophical Society, Volumen 1American Philosophical Society, 1789 Held at Philadelphia for promoting useful knowledge. |
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Otras ediciones - Ver todo
Términos y frases comunes
aftronomers alfo alſo altitude anſwer appear atmoſphere becauſe beſt branches buds cafe clock cloſe Cofine comet compariſon confiderable courſe diameter diff difference dift diſcover diſeaſe diſtance ditto earth ecliptic external fame fatellites feconds feed feemed feen fermentation fhall fide firft firſt fixed fmall foil fome foon fpirits fpring fruit fubject fuch fufficient fuppofed grapes greateſt Greenwich ground h. m. fec heat horizontal parallax inches increaſe inftrument internal contact Joel Bailey June laft laſt latitude leaft leaſt lefs longitude mean meaſures merid meridian micrometer moft moſt motion muſt myſelf neareſt neceffary Norriton obfervations obfervatory occafion paffed parallax Pennſylvania Philadelphia plant prefent preferve purpoſe raiſe reaſon refpect ſeen ſhall ſhould ſmall Society ſtakes ſtand ſtate Sun's limb Sun's Par teleſcope thefe themſelves theſe thofe thoſe thread of light tranfit of Venus Upfal uſe Venus's vines vineyard viſible weft wine
Pasajes populares
Página 2 - ... age of the, moon, the position of the planets, the cycle of the years, and many other serviceable notices ; and these movements may fulfil their purposes with more or less perfection, according as the mechanism is better or worse contrived, or better or worse executed, or...
Página xvii - Knowledge is of little use, when confined to mere speculation : but when speculative truths are reduced to practice, when theories grounded upon experiments, are applied to...
Página 1 - From the centre arises an axis to support a gilded brass ball intended to represent the sun. Round this ball move others, made of brass or ivory, to represent the Planets: they are to move in elliptical orbits, having the central ball in one focus, and their motions to be sometimes swifter, and sometimes slower, as nearly according to the true law of equable description of areas as is possible, without too great a complication of wheelwork.
Página 313 - ... to make it fluid. The fecond method is, after the fpecimen and fpirits are put into the bottle, dry the infide of the neck and edge thoroughly, and anoint them with a feather dipped in oil, flop the bottle with a cork well fitted and fteeped in oil, till it has imbibed as much as it can contain, cover the cork and edge of the bottle with a layer of putty prepared as directed above, and tie a piece of foft leather or bladder over the whole.
Página 154 - ... half the difference of the two differences X ; And half the fum of the two differences Y. Let the half interval, between the two obfervations of the fame day, be Z. THEN, if the times of the altitudes...
Página 313 - ... in a fmall wooden cup, and fill it with melted tallow, or tallow mixed with wax, until all the' bladder or leather cover is buried in it, and the tallow adheres to the fides of the neck. This will effectually prevent the fine part of the fpirits from flying off.
Página 183 - Upon the marriageofoneofthem, he gave with her as her dowry, onethird of his vineyard; and then doubled his diligence, and cultivated the remainder fo well, that it yielded him as much as the whole had done before: Upon the marriage of the other daughter, he gave with her one other third of his vineyard ; and now having but one third part of the whole left ; he fo manured and cultivated it, that it yielded him full as much as the whole had done at firft.
Página xix - Could we be so fortunate," said the American Philosophical Society, " as to introduce the industry of the Chinese, their arts of living and improvements in husbandry, as well as their native plants, America might in time become as populous as China which is allowed to contain more inhabitants than any other country of the same extent in the world.