A great-grandfather was listed in the 1900 census as a "stationary engineer"; the next two show him as "machinist", and I'm guessing he had not changed trades.

A great-grandfather was listed in the 1900 census as a "stationary engineer"; the next two show him as "machinist", and I'm guessing he had not changed trades. I doubt his schooling went beyond about 8th grade, for his father was a farmer in northern Germany.