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III.—Researches in Optical Activity. Part I: The Temperature-Rotation Curves for the Tartrates at Low Temperatures

Published online by Cambridge University Press:  15 September 2014

T. S. Patterson  and
K. L. Moudgill
T. S. Patterson
Affiliation:
University of Glasgow
K. L. Moudgill
Affiliation:
University of Glasgow
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Extract

But a few years ago the diverse phenomena of optical activity, such as the changes of rotation which occur with alteration of temperature, of colour of light, of solvent, or of concentration in a solvent, appeared, in spite of the great accumulation of relative data, to be practically independent of each other, and gave very little hope of satisfactory generalisation. Quite recently, however, the possibility of bringing into one scheme all these different branches of the subject has become more than a mere aspiration, and the progress which has been made by several investigators reveals clearly the existence of a deep-seated and farreaching regularity underlying the remarkable sensitiveness to external conditions of the phenomena in question.

Type
Proceedings
Information
Proceedings of the Royal Society of Edinburgh , Volume 39 , July 1920 , pp. 18 - 34
Copyright
Copyright © Royal Society of Edinburgh 1920

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References

page 18 note * Temperature-Rotation.

page 22 note * p = grams active substance per 100 grams of solution.

page 23 note * Concentration-Rotation.

page 27 note * The diagram is drawn according to the author's modification of Armstrong and Walker's method. Rotation values for Hgg are plotted along the horizontal axis (the reference line), the differences between the rotation values for Hgv and Hgg, and Hgy and Hgg respectively being then plotted, according to sign, vertically above or below the corresponding values for Hgg. The actual rotation value at any point on the diagram is the horizontal distance from the zero-point, plus (or minus) the vertical distance from the reference line. (See J.C.S., 1916, 109, 1181.)