A dissertation on quick-lime and lime-water ... / [Charles Alston].

  • Charles Alston
Date:
1752
Catalogue details

Licence: Public Domain Mark

Credit: A dissertation on quick-lime and lime-water ... / [Charles Alston]. Source: Wellcome Collection.

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    in it, by which not a few of the Learned account for it, did not fatisfy the great Mr Boyle (c), though he had obferved that two Drams of Calx vive were increafed on the Cupel to two Drams twenty-nine Grains (dj. And the learned D. Ludomkiis thus concludes his Experi¬ ment a cum cake ‘vi'va faBa (e). An ^vero ignearum par- iicularum hie conclufarum fuga (ceu a fuperiori feculo hucuf- que permultis viris eruditijfimis placuit) Jimpliciorinje luBa^ aut modijicata quadam nutritione (quo Excel!. Conringius in- clinavit) alia've elementi primi congregatione contingatj deter- minatu profeSlo eeque adhuc-dum deprehenditur diddle: nec rejiitantes hinc inde obfeuritates fatis determinari pojffe <viden- tur, donee etiam de penitiore ignis natura plenius atque plani- us conjiiterit aut connjenerit. It is well known, that Spi¬ rit of Wine, Oil of Vitriol, Filings of Iron, i^c. grow hot with Water; that a Mixture of Iron, Brimftone, and Water, takes fire of itfelf; and that the Weight of Lead, Tin, Antimony, is much increafed by Calcina¬ tion. But that a fecond Calcination ftiould have the fame Effeft on Calx vive, is truly lingular j efpecially fmcc its Weight is not proportionably diminilhed, however long drenched in much Water; as will afterward ap¬ pear. I kept half a Dram of Chalk Quick-lime in a red-hot Crucible, full two Hours; and three Hours af¬ ter weighed it, when it had neither loft nor gained any thing, but was juft half a Dram as before. But grant¬ ing Fire were fixed in Calx vive, and its growing hoc in Water, owing to this Fire’s being fet at liberty; yet, 4. The Virtues of Lime-water cannot depend on this Fire. For (a) the Heat is foon over, this Fire at liber¬ ty, foon evanifties, without leaving any other Quality behind it, than it does in boiled Water. Belides (b), if Quick-lime be kept for fome Time, or not fully cal¬ cined, however recent, it produces no Heat in Water; which neverthelefs it will impregnate with all its Quali¬ ties, as well as when it does turn it hot; that is, it will (c) Meehan. Grig, of Heat, vol. 3. p. 376. Edit, 1744. fbl. fExperiments about igneous P..rticles, ib. p. 349. (ej Ephero. Germ. An. 6. JDec. i. N. 344, Bib, fharm. !• 449, A 7- jpQiakf