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 . tion to analogous posi-tion on the other to be viewed by the observer atthat point. Me-chano-graph. One of a set of multijiliedcopies of an original, executed by means of a ma-chine. Meche. (Surgknl.) A bunch or pledget of char-pie, cotton, or raw silk, for keeping open an ulceror wound. Applied by an instrument known as aporU-m^c?ic. Mechlin-lace. (Fabrii:.) A
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 . tion to analogous posi-tion on the other to be viewed by the observer atthat point. Me-chano-graph. One of a set of multijiliedcopies of an original, executed by means of a ma-chine. Meche. (Surgknl.) A bunch or pledget of char-pie, cotton, or raw silk, for keeping open an ulceror wound. Applied by an instrument known as aporU-m^c?ic. Mechlin-lace. (Fabrii:.) A light Belgian lacewith an hexagonal mesh ; made of three flax threads,twisted and plaited to a perpendicular line, the pat-tern being worked in the net, and the jilait-threadsurrounding the flowers. Me-come-ter. (Sitrgical.) A graduated in-strument used at the Hospice de Maternite in Paris,to measure new-born infants. Medal. An ancient or a memorial coin. Me-dallic En-graving. In this beautiful artthe direction and distance of the lines are so modifiedas to give the appearance of a figure or object in re-lief. It is executed by machinery. The machinesof M. Collas and Mr. Bate, as well as those of Asa MEDALLION. 1418 Spencer, , mill , are all ini-^proveuients uiion \an apparatus in aFreuili work, the Manuel deTour-neur, about1814. This ma-chine will give agood general idea of the construction of these machines, and its opera-tion is as follows : — The medal and the copper on which the medal is tobe engraved are on two sliding plates at rightangles to each other, and so connected that whenthe plate on which the metal is is raised verti-cally by a screw, the side holding tlie copper plateis advanced by an equal quantity in the horizontaldirection. The medal is fixed on the vertical slide,with its face toward the copper plate and a littleabove it. A bar, terminating at one end in a trac-ing-point and at the other in a short
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
