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Buick Valve-In-Head - The Siege Gun of Gas Motors

3-1/4" x 6-1/4", 17 pages, printed in three colors, exceptionally well-illustrated throughout with many photographs and demonstration drawings, including an excellent photograph of a 1915 Buick Model C-55.  Originally copyrighted in 1915, this is an exceedingly rare 1915 booklet that describes the engineering principals and advantages of Buick's Valve-in-Head engines.  The first page of this booklet states, "The engineering principal of this gun and the Buick Valve-In-Head motor is the same.  The reason this gun has such tremendous power is because ALL the powder is exploded directly behind the bullet, exactly as ALL the gasoline vapor is exploded directly behind the piston in the Buick motor."