This section is from the book "Spons' Mechanics' Own Book: A Manual For Handicraftsmen And Amateurs", by Edward Spon. Also available from Amazon: Spons' Mechanics' Own Book.
Mecum for all engaged in' the Superintendence of Building Operations, by G. G. Hoskins, F. R I.B.A., third edition, fcap. 8vo, cloth, 1s. 6d.