Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . iln for burning Pottery, above tlio floor, below which are flues i i for tlie I In Fig. 3927, the gases and products of combus-circulation of flame, all meeting at the center k. II tion pass otf through the doorwajs or double wallsare sight-holes, enabling the workmen to see the and openings connected with tlie lower Hue, a topinterior of the kiln, that they may
Knight's American mechanical dictionary : a description of tools, instruments, machines, processes and engineering, history of inventions, general technological vocabulary ; and digest of mechanical appliances in science and the arts . iln for burning Pottery, above tlio floor, below which are flues i i for tlie I In Fig. 3927, the gases and products of combus-circulation of flame, all meeting at the center k. II tion pass otf through the doorwajs or double wallsare sight-holes, enabling the workmen to see the and openings connected with tlie lower Hue, a topinterior of the kiln, that they may watch the action flue connecting the space between them by means ofof the fire and regulate the draft accordingly. | tubes for carrying oBT the vapor of the gieen material, IOTTERY-MOLDING. 1780 POUNCING-MACHINE. tluTB being a double arcli for heating tlie air on itsway to tile tirejilaee ami retiuTiiiig it. A bottom Huealso coinnuuiicates with the kihis ami ,to prevent the loss of heat and drawing up of in the kiln. The views are a partial longitu-dinal seetiou and elevation, and a transverse A maehine for shapingarticles of pi;istie clay. The llask is attached to a Fig. PotUry-Moldins: Machine. vertically .sliding frame, and its charge is bioughtinto contact with a revolving core. The iscomposed of a series of sections, which cau be openedto remove the pot after bottom of the tlask is also mov-able, aiul is pressed up to facilitatethi removal of the moldeil pot. Potter-y-painting. In thisart enamel colors are used, such aswill withstand tlie lire unchangedor will develop their colors underheat. Various metallic oxides areused for this purpose. See Enamel. Painted porcelain is fired in a niuffle-fur-nacte. Potter-y-printing. {Pottery.) Thedevici* for tlie ])late or other article is en-graved on copper or otherwise, and an im-pi-ession taken on a piece of unsized pai) is wetted and jilaeed over
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