Valve-gears for steam-engines
An 1892 engineering textbook by Cecil Hobart Peabody, published in New York by John Wiley for mechanical engineering students and steam-engine designers. Numbered plates pair line-engraved valve diagrams — nested circles, arcs, radiating construction lines and lettered points — with sectioned mechanical drawings of valves and shafts, offering thin-line geometric figures and hatched cutaways usable as technical ornament or diagram templates.
