Description - Scales and Balances by J.T. Graham
When prehistoric man picked up his first stone he would not appreciate that its weight was due to the effect of gravity on its mass. Soon, though, he would learn that large objects were sometimes lighter than smaller ones and that he would need an aid to help compare weights and values. Today, we accept weighing as part of everyday life, using its principles as measures of our idea of justice, but giving methods of weighing little thought. Weighing, however, is an ancient art, which has exercised the minds of philosophers, scientists, engineers and even the dishonest for at least 6000 years. This book shows how men strove to produce a machine which would compare more accurately, or more quickly, or would meet a special need or perhaps sell even more cheaply. With the aid of many illustrations and non-technical language, some essential knowledge of the principles of weighing is provided.
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Publisher: Bloomsbury Publishing PLC
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Author Biography - J.T. Graham
The late JT Graham had a considerable collection of old scales and old weights and measures and was a senior officer in the weights and measures department of a large local authority. The late Maurice Stevenson, who revised this book for its third edition, was a senior inspector of weights and measures and also a keen collector of old scales and weights. As a member of the International Society of Antique Scale Collectors he contributed articles to its journal 'Equilibrium'