This section is from the book "Modern Buildings, Their Planning, Construction And Equipment Vol2", by G. A. T. Middleton. Also available from Amazon: Modern Buildings.
The stone throughout to be the best and hardest of its respective kinds, free from every defect, and to be laid on its natural bed and jointed in cement, with all requisite slate dowels, double plugs, copper cramps, lead, etc., and properly cleaned down at completion.
 
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