Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,717 pages of information and 247,131 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.
of New York
1901 Mr Peter Cooper Hewitt of New York invented the first practical, commercial mercury vapour lamp. Within 2 years British Westinghouse had introduced it into Europe[1].
1921 Death of Peter Hewitt (1861-1921), inventor of the mercury vapour lamp, mercury acr rectifier and other devices[2].
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