JF Ptak Science Books Quick Post
This unlikely combination of vehicle and fuel source appeared in Popular Mechanics for June, 1917.
It was fueled by “illuminating gas” which was a hydrogen/hydrocarbon mix and which was made to fire street lamps and such, a destructive process introduced in the very early 19th c. It is highly flammable. Highly.
This suggestion for a 600 cubic ft power envelope for a motorcycle was supposed to save about two-thirds on fuel costs and replace the use of wartime gasoline, but…
[For “illuminating gas” see the following 1869 entry from Scientific American: https://www.scientificamerican.com/article/illuminating-gas-what-it-is-and-how/]