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Published online by Cambridge University Press: 17 January 2013
A laboratory is an inhabited room, and in Northern Europe the temperature of such apartments lies generally between 12° and 20°C. Consequently we find that a large amount of specific gravity work has been done at 15°C. by Gerlach, at 19·5° C. by Kremers, and at 17·5° C. by others ; while the calorimetric work by Julius Thomsen, extending over the last half-century, was all done at the temperature 18° C.