Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 174,140 pages of information and 250,321 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.
Dr. Wilhelm Rudolph (Rudolf) Proell of Dresden
See Rudolph Proell
1880 Description of Proell's Automatic Expansion Gear for steam engines.[1]
His wife was Henriette Emilie Auguste Proell
He died in 1892
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