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.

Bryan Higgins

Date:: 1780

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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[ 6. ] the lime and fand of my oldeft and hardeft cements in the fame proportions in which I had mixed them. » , % By this kind of analyfis, and by other trials, I found that the quantity of lime in old cements made with clean Iharp fand, and noted for their hardnefs, was much lefs than is now commonly ufed in mortar ; and that in the hardeft, it wras very near to that which my experiments indicate to be the beft. i By fharp find I mean that whofe grains are bounded by flat furfaces. Thus I found the inferences made from my compoftions to be authenticated by long ex- perience, fo far as they relate to the propor- tions of lime and fuch find.

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