CHAPTER VI.

THE CHAIN AND ITS FUNCTIONS.

A Greater Knowledge and Care of Chains Desirable—Evolution and Operation—Attempts to Reduce Chain Friction—Roller Sprockets and Roller Chains—Various Points and Kinds of Friction—The Several Types of Chain Now in Use—Improved Sprockets—Results of Actual Tests—Chain Adjusters—Chain Bolts and Repairs. Pages 58-66