Sewerage and Sewage Disposal / by Henry Robinson.

Date:
1896
Catalogue details

Licence: Public Domain Mark

Credit: Sewerage and Sewage Disposal / by Henry Robinson. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    CRAIGENTINNY. The well-known Craigentinny sewaged meadows near Edinburgh are composed chiefly of poor sandy land. Analyses of the soil, after many years of continuous irrigation with large volumes of sewage, prove that the sandy area contains only about ii per cent, of organic matter, and this is due solely to root fibres. The Craigentinny irrigation farm is described by Mr. Fairley, C.E., as having an area of about 236 acres. These meadows were laid out upwards of two hundred years ago, and a part under Italian grass and other crops about fifty years ago. The subsoil varies between a stiff boulder clay and light sands and gravels, the bulk being underdrained with 2-inch and 3-inch tile drains laid ten yards apart and at a depth of 3 feet. The sewage is conveyed along the higher ground by main carriers 5 feet by 2 feet, delivering into secondary carriers 2\ feet by 2 feet, which divide the land up into f-acre plots. From these secondary carriers small leaders and turf drains 12 inches by 6 inches are cut, so as to distribute the sewage as evenly as possible over the surface of the meadows. The