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 . II I Iz) I I Rotary-Harrow. angular. S]^eciinens of each would be given,did space permit. SpikedCylinder Harrow and Seeder. HAKVESTER. 1069 HAT. bined as to keep the harrow stretcheJ, wliile a certainnumber of tlie teeth, at regular intervals, have de-pendent spikes. The spiked-cylinder harrow, known in England asthe Norwegian harrow, has three sets of rowelspla
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 . II I Iz) I I Rotary-Harrow. angular. S]^eciinens of each would be given,did space permit. SpikedCylinder Harrow and Seeder. HAKVESTER. 1069 HAT. bined as to keep the harrow stretcheJ, wliile a certainnumber of tlie teeth, at regular intervals, have de-pendent spikes. The spiked-cylinder harrow, known in England asthe Norwegian harrow, has three sets of rowelsplaced in gangs upon an iron It is used forreducing the land to a line tilth for the reception ofseed, which it does to a depth of three or fourinches in soil which is in suitable preliminary amount of drawing spiked tools over a wet claybed will unike frialile soil, and the use of this tool,as well as of i rushiug-roUers, is a thing to be done inthe right time and place. Fig. 2414 shows an Ameri-can form of this tool, which is inteniled for sowingfertilizers, grain, and grass-seed, and harrowing in thesame. A portion of one driving-wheel is brokenaway in the upper view, in onler to expose theinternal cog-gear by w
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Keywords: ., bookcentury1800, booksubjectin, booksubjectmechanicalengineering
