IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. An engine indicator is an instrument ...

This steam engine indicator consists of a steel piston with three grooves; a vented steel cylinder; an external, double wound spring, which can be changed; a small drum with a spiral spring and a ...

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A USEFUL little treatise, easy to read and understand, and well illustrated. It has some defects. The error due to stretching of the cord is thought to be merely a ...

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