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A Treatise on Military Surveying, Theoretical and Practical
George Henry Mendell
Sin vista previa disponible - 2019
accuracy adjustment altitude angle applied Army assumed axis azimuth base bearing centre cloth compass complete construct contains correction cross curves determined difference difference of level direction distance divided division draw elevations Engineer equal error extremity feet field fixed given gives glass graduated ground half height hence horizontal illustrated important inches inclination Infantry instruction intersection known latter length less limb marked means measured meridian method middle military necessary needle object observed obtained officer operations parallel pass plane plate points position practical prepared primary principal projection reference represent road scale screw seen side sight sketch slope staff station suppose survey taken tangent telescope tion triangles turn United valuable vernier vertical volume
Página 72 - A, about sixteen inches square, having its upper edge rabbeted, to receive a boxwood frame, B, which being accurately fitted, can be placed on the board in any position, with either face upwards. This frame is intended both to stretch and retain the drawing paper upon the board, which it does by being simply pressed down into its place upon the paper, which for this purpose must be cut a little larger than the board. One face of the frame is divided...