Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 162,255 pages of information and 244,497 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.
François Calla (1802-1884) was a French engineer, the son of Etienne Calla.
He had been a pupil and friend of Jacques de Vaucanson.
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