Appleton's dictionary of machines, mechanics, engine-work, and engineering (1861)
Appleton, firm, publishers, New York. (1852, D. Appleton & Co.) · New York : D. Appleton · leaf 279
, and the side A of the mould is then well dusted; alayer of sand is now thrown on, and rammed tolerably firm to form an annular core, which is madeexactly level with the inner margin b of the pattern, and the core is well dusted; lastly, the side B isput on and rammed as usual To extract the… … The entire mould is now turned over; A is first removed, then the remaining half pattern a, a, whichmust be touched very tenderly or it will break down the core; and the runner (which divides in twobranches around the core) is also scooped out in the side A, which is dusted with flour and…
Mechanical engineering
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