Note on the Composition of Gas Lime

Extract

Very few analyses of gas lime have been published; consequently the following analyses made in the laboratory of the Department of Agriculture of the University of Cambridge may be of interest to readers of this Journal.

The samples of gas lime were obtained from the Cambridge Gas Works. One was what is known as carbonated lime, that is to say, lime which had been used for purifying the gas after it had previously been purified by hydrated ferric oxide. This sample, as shown by the analysis, is practically moist calcium carbonate. It was obtained in a perfectly fresh condition. The second sample was described by the Works Manager as “sulphided lime.” It had been used for purifying gas without the previous use of ferric hydrate. A sample was taken from the centre of a large heap which had been standing for about a year.