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A graphical method for the rapid correction of specific gravity determinations

Published online by Cambridge University Press:  14 March 2018

A. Hutchinson
A. Hutchinson*
Affiliation:
University of Cambridge
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Extract

It has long been recognized that if specific gravity determinations are to be accurate to a unit or two of the third decimal place corrections must be applied for the error due to the circumstances (i) that the weighings are made in air instead of in a vacuum, and (ii) that the temperature at which the determinations are made usually differs considerably from the standard temperature of 4° C.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 20 , Issue 104 , March 1924 , pp. 198 - 200
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1924

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References

Note

1 The method of arriving at this formula is discussed in the text-books, e. g. W. Watson, ‘A text-book of Practical Physics’, or F. Kohlrausch, ‘Leitfaden der praktischen Physik’. For an account of the precautions necessary in accurate work reference should be made to A. E. H. Tutton, ‘Crystallography and Practical Crystal Measurement’, 2nd edit, 1922, vol. 1, chap. xxxii, and also to a recent paper by A. C. Egerton and W. B. Lee, Prec. R. Soc. London, 1928, ser. A, vol. 103, p. 487, where other references will be found. The values of D have been taken from the tables of Landolt and Börnstein, 2rid edit, 1894, p. 39.