Licence: In copyright
Credit: The sanitary inspector's handbook / by Albert Taylor. Source: Wellcome Collection.
Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.
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![cool, while the superfluous lead is cut off with a cold chisel. Lead naturally shrinks, so that to make a tight joint it requires to be thoroughly caulked, which is done, first with a hammer and a flat caulking tool, and afterwards with a similar broader tool, with a slight curve correspond- ing with the size or radius of the pipe. The rust joint is frequently used for cast-iron pipes when connected to the blow off from boilers and for steam pipes. A quickly setting iron cement is com- posed of:— 98 parts of fine cast-iron borings. I part flowers of sulphur. I part sal ammoniac. To be mixed with boiling water before use. A slow setting rust cement is made up as follows :— 197 parts of fine cast-iron borings. 1 part flowers of sulphur. 2 parts sal ammoniac. Mixed as before mentioned. To ensure the tightness of the joints of stoneware pipes, they should be caulked with spun yarn or hemp, and the remainder of the socket filled, and backed with a substan- tial fillet of Portland cement or an even mixture of the best Portland cement and clean sharp sand. The cement and sand should be thoroughly mixed dry, and then wetted only] as required. No lime should ever be used in this mixture, nor should any cement be used which has begun to set. There are numerous patented joints for stoneware pipes but these are seldom used for the drainage of houses' unless under specially difficult conditions, such as water m trenches, or when the laying is affected by the influence ■ot tides, &c. The following brief description of some of the more L 2](https://iiif.wellcomecollection.org/image/b2135876x_0163.jp2/full/800%2C/0/default.jpg)
