Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 167,858 pages of information and 247,161 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.
1866 Patent to James Ingram, Merchant, and Heinrich Stapfer, Dentist, both of the city of Manchester, and county of Lancaster, for the invention of "improvements in apparatus for testing the lubricity of oils and other lubricants."[1]
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