Volume 1

The chemical works of Caspar Neumann ... / abridged and methodized. With large additions, containing the later discoveries and improvements made in chemistry and the arts depending thereon by William Lewis.

  • Caspar Neumann
Date:
1773
Catalogue details

Licence: Public Domain Mark

Credit: The chemical works of Caspar Neumann ... / abridged and methodized. With large additions, containing the later discoveries and improvements made in chemistry and the arts depending thereon by William Lewis. Source: Wellcome Collection.

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    arifes in burning them, and which extends to a con- Lime- fiderable diftance from the kilns. The Lime-ftones Stone. ufed in this country yielded in diftillation an Acid —' Liquor, which turned Syrup of Violets red, pre¬ cipitated Solution of Silver, and formed with Mer¬ cury a corrofive Sublimate y a proof that the Acid was marine. The fame Acid was difcovered alfo after the Stone had been burnt into perfect Lime; Oil of Vitriol extricating from the Calx vapours manifeftly marine. The Limes prepared from different Stones, though they may anfwer equally for morter and other common ules, are found to differ confiderabiy in fome of the nicer chemical experiments. IV. Q^U ICK-LIME. OUICK-LIME is an acrid Calx, fo corrofive as Quick- to oe employed by the tanners for deffroying the Lime. fat and flelhy parts of ikins, and occcfionino- the v--—' hair tofeparate. It raifes a ft rong heat and ebullition on Genera! the affufion of water, and in part diffolves; redified piopeities* Spirit of Wine has fcarcely any adion on it, and oils none at all. Slaked with water, or moiftened into the confiltence ot a palte, and mixed with a proper quantity of Sand or other hard bodies, it acquires a notable degree of hardnefs on expofure to the air; hence morter and cements (q): A large quantity of water impairs or deftroys this property. The vapour which arifes (q) Morter and Cements.] Lime made into a pafte with water alone, acquires on expofure to the air fome degree of hardnefs, which leems to be proportionable to that of the original Earth or Stone which the lime was made from ; the Chalk Limes remaining foft and crumbly wh11ft thole prepared from Marble become notably hard. If either of them be mixed with glutinous liquors, as Milk, Blood, Solution of Gum, or beat with Cheefe foftened by boiling in Water, they become harder than by themfelves, and in a fhcrter time : hence the ufe of thefe compohtions for joining cracked GlalTes, &c. Lime mixed with Sand or other hard ftony bodies in coarfe Powder, forms a concrete ftili harder, and whofe hardnefs is increafed by length of time ; whence 1w-P?1t the rema!kable induration of the morter of ancient buildings. ’th Sand or Flint in fine Powder, it did not feem to grow harder than byptfelf: nor did any of the Earths of the other claffes fenfibly improve its confidence. 3
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