. Cranberry culture. Cranberries. 66 CRANBERRY CULTURK. meadow that may be depen<led upon, is one constructed of clean sand, free from roots, or pieces of turf, and built upon the solid sand or loam, as the case may be. If it be desired to build a dam across a meadow con- taining muck six feet in depth, dig a road entirely through the muck, and lay the dam upon a sure foundation, or it will not stand the test. Before commencing the dam, learn where you want it, and then how large the flood will require it to be. Its locality must depend upon circumstances ; its dimensions upon the height of
. Cranberry culture. Cranberries. 66 CRANBERRY CULTURK. meadow that may be depen<led upon, is one constructed of clean sand, free from roots, or pieces of turf, and built upon the solid sand or loam, as the case may be. If it be desired to build a dam across a meadow con- taining muck six feet in depth, dig a road entirely through the muck, and lay the dam upon a sure foundation, or it will not stand the test. Before commencing the dam, learn where you want it, and then how large the flood will require it to be. Its locality must depend upon circumstances ; its dimensions upon the height of water required to flood the meadow. To determine this last point, level the ground with a theodolite, if one is at hand ; if not, take an ordinary. Fi^'. 26.—LEVELLING. spirit-level and two boards, and proceed to tlie lowest spot along the line of the proposed dam ; there drive the boards perpendicularly into the earth, eighteen inches a})art, and rest the spirit-level on top of them, pointing to the highest knoll you intend covering with water. Bring it to a level by tapping on top of the highest board. Then send your assistant to the knoll, with instructions to erect a pole, and move a white target up or down it, as you direct hitn, by the motion of your hand. By sighting along the top of the spirit-level you will be enabled to judge when the target is level with your eye. Having established this point on the pole—by a pencil mark—the difl'erence in the hciglit of the two positions may be ascertained by subtracting the height of the mark. 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 White, Joseph J. New York, Judd
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Keywords: ., bookcentury1800, bookcontributoruma, bookdecade1880, bookyear1885
