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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    into fmall fragments, I burned them in cru- cibles lined with lime to prevent the pieces from touching their crucibles and vitrifying at thofe furfaces which lay next to them *• I like- wife burned the like fpecimens in crucibles perforated to admit a free current of air through them ; and laftly, I expofed three pounds of either fpecimen to a graduated fire in an earthen retort which was barely fuffi- cient to hold this quantity, and whole neck I lengthened by fitting to it a glafs conical tube luted at the jun&ure with four parts of lime one of fine fand and as much difTolved glue fuch as the carpenters ufe, as was fufficient to form a pafle ; having found this luting to hold fall and to be impervious to any elaffic fluid or liquor expelled in fuch procefles. I immerfed the extremity of the glafs tube in mercury, and inverting a bottle filled with mercury over the extremity of the tube, I received whatever water or elaf- tic fluid was expelled from the calcarious Hones by the fire, and I meafured the quan- tity of thefe by inflantly applying a frefh bottle as foon as the former was filled* W hen all the water was expelled, or when I knew the quantity of it contained in the lime-