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Excerpt from Operative Masonry, or a Theoretical and Practical Treatise of Building: Containing a Scientific Account of Stones, Clays, Bricks, Mortars, Cements, &C.; A Description of Their Component Parts, With the Manner of Preparing and Using Them
IT is rather surprising that, notwithstanding the number and magnitude of our public edifices exe cuted in stone, and the numerous Treatises which have been published on the art of Carpentry in this and other countries, no work on the Principles of Masonry has yet appeared in England, except one on Stone - cutting by General Vallancey, pub lished in London in 1766. The General, though he has not avowed it, has copied the diagrams and references from a very able French work on the subject by De la Rue. This English publication was intended to consist of five parts, yet only one has been given to the Public; and that without inserting the most valuable of the precepts and observations which; are in the original _work.. And this is more surprising, when we consider that no department in the art o¿building affords so great a scope for ingenuity, or needs so much an exten sive knowledge of the best aids of Geometry, as the Art of Stone-cutting.
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