Farrow's military encyclopedia : a dictionary of military knowledge . ompass circle, to determine the magnetic bear-ing of the lines drawn on the paper, or tlie directionof the table itself. The table is made of wood ar-ranged in sections so as to prevent warping, and hasan adjustable wooden roller at each end by whichthe paper is brought down snugly to the board, orupon which a long sheet can be rolled and unrolledat will. In place of the rollers, sometimes, and oftenin combination with them, a number of brass clampsas shown are used in holding the paper firmly. Theplumbing arm shown in the f
Farrow's military encyclopedia : a dictionary of military knowledge . ompass circle, to determine the magnetic bear-ing of the lines drawn on the paper, or tlie directionof the table itself. The table is made of wood ar-ranged in sections so as to prevent warping, and hasan adjustable wooden roller at each end by whichthe paper is brought down snugly to the board, orupon which a long sheet can be rolled and unrolledat will. In place of the rollers, sometimes, and oftenin combination with them, a number of brass clampsas shown are used in holding the paper firmly. Theplumbing arm shown in the figure has its end broughtto a point, that it may be set at any given point onthe paper, the plunnnet hanging from the underarmdetermining the corresponding point on the ground;the lower arm moves upon a hinge, an index on theside showing when the ends of the two arms areplumb with each other as applied to the table. The construction of the socket and tripod-head isshown in the drawing on page 53,5, in which n repre-sents the hemispherical concave metal cup fastened.
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Keywords: ., bookcentury1800, bookdecade188, booksubjectmilitaryartandscience
