![](http://www.alamy.com/thumbs/6/AA281CC3-3498-4327-B69C-836BDF732639/2BAGX82.jpg)
Vintage diagram of a Gothic two-cycle oil-engine (Melhuish's patent) 1900s.
The Harmsworth Encyclopaedia 1930s / 1940s
Size: 3205px × 2260px
Photo credit: © Michelle Bridges / Alamy / Afripics
License: Royalty Free
Model Released: No
Keywords: -cycle, 1900s, 1930s, 1940s, diagram, early, education, encyclopaedia, engine, engineering, engines, gothic, harmsworth, history, oil-engine, reference, social, vintage, working