Grace's Guide To British Industrial History

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Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,711 pages of information and 247,105 images on early companies, their products and the people who designed and built them.

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Porter Water Softening and Engineering Co

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Presumably a successor in some way to Porter Clark Water-Softening Co

1921 Porter's patent densimeter described by W. H. Porter.[1]


See Also

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Sources of Information

  1. ↑ The Engineer 1921/02/25
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