Appleton's dictionary of machines, mechanics, engine-work, and engineering (1869)
New York, Appleton · leaf 91
h Both of these constructions belonged to a period when iron, more or less malleable, (an object olearlier utility in the arts than crude iron,) was produced direct from ores whose choice and valuedepended then greatly upon such a property. And both are of the kind which the Germans callttuck-ofen,…
Mechanical engineering
Internet Archive · Gerstein Library, University of Toronto · Public Domain Mark 1.0. Free to use for anything.
