The tinman's manual and builder's and mechanic's handbook : designed for tinmen, japanners, coppersmiths, engineers ... with compositions and receipts for other useful and important purposes in the practical arts (1861)
Butts, I. R. (Isaac Ridler), 1795-1882 · Boston : I.R. Butts & Co. · leaf 32
D, whichis one-half of the length of the boiler ; tlicn mark the point J onequarter of an inch or more as you wish, for the pitch of the cover, andapply tlie corner of the scjuare on tlie line AB, allowing the blade tofall on the circle at II, and the tongue at the point .T ; tlien draw thelines… … Let the circle AB represent the size of the measure ; span the divi-ders from K to F three-quarters of the diameter ; describe the semi-circle DKE ; move the dividers to G the width of the lip required, anddescribe the semicircle KPJ, which will be the lip sought. THE CIRCLE AND ITS SECTIONS. 1.…
