. Textbook of landscape gardening, designed especially for the use of non-professional students. Landscape gardening. USE OF COMPASS at the end of the needle. As the course moves to the east the needle appears to have moved to the west, and vice versa; for this reason E. and W. are often reversed in position so as to make correct reading easier. Methods of Use In use the compass should be held in an approximately horizontal position and as steadily as possible. It is easier to do this if the arms from shoulder to elbow are pressed against the body and any rotation of the compass done by twisti
. Textbook of landscape gardening, designed especially for the use of non-professional students. Landscape gardening. USE OF COMPASS at the end of the needle. As the course moves to the east the needle appears to have moved to the west, and vice versa; for this reason E. and W. are often reversed in position so as to make correct reading easier. Methods of Use In use the compass should be held in an approximately horizontal position and as steadily as possible. It is easier to do this if the arms from shoulder to elbow are pressed against the body and any rotation of the compass done by twisting the body rather than by a motion of the wrists. Some compasses have two small level vials at- tached at right angles so as to show when the in- strument is level; in others the observer must judge by the position or motion of the needle or of the sight vanes whether or not the instrument is near- ly level. The compass needle is easily affected by iron or steel, and care should be taken not to use it near any such metal. Even for approximate hand work it should not be used within 8 or 10 feet of a wire fence or telephone hne or 20 or 25 feet of a railroad, while for careful instrument work 37. FiQ. 15. Using the Pocket Transit. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Waugh, Frank A. (Frank Albert), 1869-1943. New York, John Wiley & sons, inc. ; [etc. , etc. ]
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectlandsca, bookyear1922
