When both wires have been thus treated, the line of collimation is adjusted on the near object, and the telescope again brought upon the most distant point. The tube is again rotated, the reversion of the wires upon the object once more tested, and the correction, if necessary, made in the same manner. ... Sa#39; M.A. I.T.E/LS.
|Title||:||A Manual of the Principal Instruments Used in American Engineering and Surveying|
|Author||:||W. & L.E. Gurley (Firm)|