[Sectional drawing of Lenoir's igniter, 1865. 1934. Ink & colour wash, scale 1 : 1. Museum drawing relating to Lenoir's 1860 patents. The ignition coil of his gas engine caused the spark to trigger combustion. An 1860 Lenoir gas engine, inv. no. 1865-21, is in the Museum's Heat Engines (other than steam) collection]
