A textbook on mechanical and electrical engineering (1902)
International Correspondence Schools · Scranton : International Textbook Co. · leaf 389
the sametime to define a property peculiar to solids of a certainform. Let the continuously adjacent surfaces of the prism DEVELOPMENT OF SURFACES 16 shown in Fig. 1 (a) be carefully covered with thin paper, asat Fig. 1 [d). Denote each of the four surfaces by a letter,as.^, B, C, and D, and…
