 ... picket at C, lays one of the cross lines engraved on the head of the picket A on C, hooks his cord to A and stretches it to the rear in the direction given by the other line on the head of A, thus approximately setting oft  Notes on Military Surveying and Reconnaissance - Page 118by William Paterson (Lieut.-Col.) - 1882 - 146 pagesFull view - About this book
 | United States. Army. Ordnance Department - 1879 - 832 pages
...setting oft' a right angle, А С В. He plants В at the full extent of the cord, moves off to 0, ready to bring in the picket as soon as No. 1 has...completed the observation, unless there are more ranges tobe taken from the same si>ot. No. 1 moves to A, places himself facing O, with the picket exactly... | |
 | United States. Congress. House - United States - 1880 - 842 pages
...the other Hue on the head of A, thus approximately setting off a right angle, А С Б. He plants В at the full extent of the cord, moves off to C, ready...completed the observation, unless there are more ranges tobe taken from the same sjiot. No. 1 moves to A, places himself facing C), with the picket exactly... | |
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