Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 226
r Ringofen. (See Brick-makingMachinery.) The Colas principle con-sists in placing air-dried bricks on smallrailway trucks forming a long train ; thisis slowly moved through an arched cham-ber, provided in its centre with fixedfireplaces for burning the bricks; thefire in these kilns is stationary,…
Mechanical engineering -- Dictionaries
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