other curves wave in a curious manner
*
unopened figure, illustrating
Ernest Wilson, “The Relative Size, Weight, and Price of Dynamo-Electric Machines.” Proceedings of the Institution of Electrical Engineers 26 (1897): 160-178
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Mr. H. W. Ravenshaw observes: “Some of the curves are very regular indeed, and I cannot help thinking that the shape has something to do with the particular French curves in the possession of the estimating clerk. Other curves wave in a curious manner, and are perhaps taken from the prime costs of machines which are made in sets...” p 169
tags: curves; weight; E. Wilson (1897)