Motor-car principles; the gasoline automobile
Motor-car principles is a 1910 technical manual on the gasoline automobile by Roger B. Whitman, published in New York and London by D. Appleton and Co. for students and motorists learning how cars work. Its pictures are plain line diagrams of a piston and crank linkage, a two-speed gear assembly with clutch and brake bands, a four-cylinder engine wired to a magnet, and a distributor sending current to spark plugs, useful for clean schematic illustration with labelled leader lines.













