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" In building up the filtering-bed, provision is first made for the ready collection of the water by constructing upon the floor of the basin drains or channel-ways of stone or brick laid dry; then follows a layer of broken stone, the fragments being three... "
Report [for the Year Ending Dec. 31]. - Página 24
1875
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Annual Report of the State Board of Health of Massachusetts, Volumen9

Massachusetts. State Board of Health - 1878
...up the filtering-bed, provision is first made for the ready collection of the water by constructing upon the floor of the basin drains or channel-ways...follows a layer of broken stone, the fragments being three or four inches in diameter. This is succeeded by gravel screened so as to be of uniform size,...
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Cyclopædia of the practice of medicine v. 18, 1879, Volumen18

Hugo Ziemssen - 1879
...the ready collection of the water by constructing upon the floor of the basin drains or channel- ways of stone or brick laid dry; then follows a layer of broken stone, the fragments being three or four inches in diameter. This is succeeded by gravel screened so as to be of uniform size,...
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Report of the Chief of Engineers U.S. Army

United States. Army. Corps of Engineers - 1880
...up the filtering beds, provision is first made for the ready collection of the water by constructing upon the floor of the basin drains or channel-ways...the fragments being 3 or 4 inches in diameter. This 1.4 succeeded by gravel screened so as to be of uniform size ; a layer of coarser being followed by...
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Annual Reports of the War Department, Parte3

United States. War Department - 1880
...up the filtering beds, provision is first made for the ready collection of the water by constructing upon the floor of the basin drains or channel-ways...brick, laid dry. Then follows a layer of broken stone, t ho fragments being 3 or 4 inches in diameter. This is succeeded by gravel screened so as to be of...
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Annual report of the Department of Health of the State of New Jersey. 1882-84

1882
...the filtering-bed, provision is first made for the ready collection of the water, by constructing, upon the floor of the basin, drains or channel-ways...follows a layer of broken stone, the fragments being three or four inches in diameter. This is succeeded by gravel, screened, so as to be of uniform aize,...
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Legislative Documents, Volumen5

Iowa. General Assembly - 1882
...the floor of the basin from which the water is to be filtered, into the chambers below, channel ways of stone or brick, laid dry; then follows a layer -of broken stone, of three or four inches in diameter. This is succeeded by gravel, screened so as to be of uniform size...
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Report, Volumen1

Iowa. State Department of Health - 1882
...the floor of the basin from which the water is to be filtered, into the chambers below, channel ways of stone or brick, laid dry; then follows a layer of broken stone, of three or four inches in diameter. This is succeeded by gravel, screened so as to be of uniform size...
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Annual Report, Volúmenes7-8

1883
...the filtering-bed, provision is first made for the ready collection of the water, by constructing, upon the floor of the basin, drains or channel-ways...follows a layer of broken stone, the fragments being three or four inches in diameter. This is succeeded by gravel, screened, so as to be of uniform size,...
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Water Supply, Considered Mainly from a Chemical and Sanitary Standpoint

William Ripley Nichols - 1883 - 232 páginas
...up the filtering bed, provision is first made for the ready collection of the water by constructing upon the floor of the basin drains or channel-ways...follows a layer of broken stone, the fragments being three or four inches in diameter. This is succeeded by gravel screened so as to be of uniform size,...
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Annual Report

New Jersey. State Dept. of Health - 1883
...the filtering-bed, provision is first made for the ready collection of the water, by constructing, upon the floor of the basin, drains or channel-ways...follows a layer of broken stone, the fragments being three or four inches in diameter. This is succeeded by gravel, screened, so as to be of uniform size,...
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