Cleveland, OH: Edward C. McKay, 1917. 84 pp. plus advertisements. First Edition. Approximately 5 x 6 3/4". Black cloth stiff paper covers with some chipping and loss, some spotting to cover and faded title, owner signed on front-free endpaper, very few ink marks on the text, slightly musty smell, very good condition.

This text was written and the control rule designed in order to try and teach the difficult subject of the exterior ballistics of the machine gun and to simplify to a minimum the mathematical operations in the control of fire. (from the preface). Illustrated with many figures and diagrams.