Experiments and observations made with the view of improving the art of composing and applying calcareous cements, and of preparing quick-lime : theory of these arts : and specification of the author's cheap and durable cement for building, incrustation, or stuccoing, and artificial stone / by Bry. Higgins, M. D.

  • Higgins, Bry. (Bryan), 1737?-1820.
Date:
1780
Catalogue details

Licence: Public Domain Mark

Credit: Experiments and observations made with the view of improving the art of composing and applying calcareous cements, and of preparing quick-lime : theory of these arts : and specification of the author's cheap and durable cement for building, incrustation, or stuccoing, and artificial stone / by Bry. Higgins, M. D. Source: Wellcome Collection.

Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.

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    Observation. 3. The lime burned in perforated crucibles^ or in the naked fire, is whiter than that burned in common crucibles covered, in which cafe the air has not fo free accefs to it; altho* the lofs of weight be the fame in both ; but this latter kind of lime, in flaking, affords as white a powder as any other which has loft equally of its weight. What- ever portion of phlogifton it retains to pro- duce this dufky colour, is either detached in the flaking, or does not fenfibly affe£t the lime in any ufe, to which I applied it.« O b ser vati on. 4. When dry chalk or lime-ftone is ufed, in the procefs above defcribed for, making lime in clofe veffels, and for examining the matter which is expelled by fire, the quantiry of water obtainable from it by any heat-, is fo inconfiderable as to deferve no notice in out menfuration of that matter. Observation. Chalk or lime-ftone heated gradually in thefe clofe veffels, lofes very little acidulous, gas until it begins to redden : after this the B 4 elaflig