A Treatise on Weighing Machines


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Blue Book


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Weighing Machines


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Chambers's Encyclopaedia


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Annual Report of the Commissioner of Patents


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Prior to 1862, when the Department of Agriculture was established, the report on agriculture was prepared and published by the Commissioner of Patents, and forms volume or part of volume, of his annual reports, the first being that of 1840. Cf. Checklist of public documents ... Washington, 1895, p. 148.




Index of patents


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Testing of Weighing Equipment


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