. Agricultural engineering; a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Agricultural engineering. 20 AGRICULTURAL ENGINEERING Equivalent Table Sq. ch. Sq. rd. Sq. li. 10 160 100,000 1 16 10,000 1 625 Surveyor's Measure. 625 square links (sq. li.) make 1 square rod (sq. rd.) 16 " rods " 1 " chain (sq. ch.) 10 " chains " 1 acre 640 acres " 1 square mile, or one section A. Cloth and Metallic Tapes. Tapes made of linen cloth are not practical to use in land surveying, even when
. Agricultural engineering; a text book for students of secondary schools of agriculture, colleges offering a general course in the subject and the general reader. Agricultural engineering. 20 AGRICULTURAL ENGINEERING Equivalent Table Sq. ch. Sq. rd. Sq. li. 10 160 100,000 1 16 10,000 1 625 Surveyor's Measure. 625 square links (sq. li.) make 1 square rod (sq. rd.) 16 " rods " 1 " chain (sq. ch.) 10 " chains " 1 acre 640 acres " 1 square mile, or one section A. Cloth and Metallic Tapes. Tapes made of linen cloth are not practical to use in land surveying, even when well made and water-proofed. They will stretch when pulled up tight, and are difficult to handle in the wind. A cloth tape is much improved when small brass wires are woven lengthwise into it to check the tendency to stretch. Such a tape is said to be a metallic tape. These tapes are made to wind into a case of sheet metal or leather, and for this reason are very convenient to carry about. Steel Tapes. The steel tape is now the standard measuring in- strument, as it has many advan- tages. It does not kink, stretch, or wear so as to change its length. The steel tape may be obtained in lengths varying from 3 feet to 1000 feet. These tapes may be marked or graduated in any form desired. The two common methods of marking the tape are by either etching the surface with acid, or stamping the marks on solder placed on the tape at the desired places. A tape. Fig. 2. A metallic tape. This tape has brass or cop- per wires woven into it 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 Davidson, Jay Brownlee, 1880-1957. St. Paul, Minn. , Webb Pub. Co.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectagricul, bookyear1919
