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 35
ut on the upper or larger arc CDC, making dueallowance for the locks, wire and burr. This is for one piece ; if fortwo pieces you will lay out only one-half the circumference on theplate ; if for three pieces one-third ; if for four pieces one-fourth ; andso on for any number, remembering to make… … Draw an indefinite line AB ; then span the dividers one-fourth the■width you wish the heart, and describe two semicircumferences ACand CB ; span the dividers from A to B, the width of the heart, anddesaribe the lines AD and BD, which completes the description. CYCLOID.Fig. 18.
