John Howard Cromwell

1857 – 1937

• A Treatise on Toothed Gearing
• A Treatise on Toothed Gearing: Containing Complete Instructions for ..
• A System of Easy Lettering
• A Treatise on Belts and Pulleys: Embracing Full Explanations of Fundamental ..
• American Business Woman
• Treatise on Belts and Pulleys. Embracing Full Explanations of Fundamental Principles; Proper Disposition of Pulleys; Rules, Formulas
• Treatise on Toothed Gearing : Containing Complete Instructions for Designing, Drawing, and Constructing Spur Wheels, Bevel Wheels, Lantern Gear, Screw Gear, Worms, etc. , and the Proper Formation of Tooth-Profiles
• Treatise on Toothed Gearing. Containing Complete Instructions for Designing, Drawing, and Constructing Spur Wheels, Bevel Wheels, Laterns Gear, Screw Gear, Worms, etc. , and the Proper Formation of Tooth-Profiles. for the Use of Machinists, Pattern-maker