Gasoline Engine Advantages

By 1903 the gasoline engine was already recognized for its obvious benefits

Garllus & Spooner engine
April 1903 ad for Garllus & Spooner engine. Faintly visible to the right of the flywheel are the words "Chicago Engr. Co." It's assumed this was the actual manufacturer and that Garllus & Spooner was simply a jobber. No information has been found on either company, a not particularly surprising fact given the profusion of engine manufacturers that appeared around this time.