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TABLE 145.-Elevation of the boiling point of sucrose solutions above that of water at various vapor pressures -Continued

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Elevation, degrees centigrade, above the boiling point of water

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TABLE 146.-Purity factors for use with dry-lead defecation 1

(The direct polariscope reading of the solution times the factor corresponding to the Brix gives the coefficient of purity]

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TABLE 148.---Optical rotation and melting point of certain sugars and sugar derivatives

[This table lists the melting points, optical rotations, and molecular weights of a selected group of sugars and derivatives.

Unfortunately, there is no universally accepted nomenclature for the sugar derivatives, and therefore names have been selected to
conform as far as possible with the general principles of established nomenclature for organic compounds. The alpha and beta modifica-
tions of the heptoses and higher sugars have been named according to the suggestion of Isbell, while the alpha and beta names in common
use have been retained for the lower sugars.

With only a few exceptions (where the importance of the compound makes inclusion desirable) only crystalline compounds are given.
The derivatives are listed under the parent sugar in the following order: hydrazones, osazones, methyl ethers, acetates, halogeno-acetates,
of sucrose and glucose is included.
glycosides, acetone derivatives, acids, lactones, amides, hydrazides, and glycals. A comprehensive list of well-defined crystalline derivatives

For the calculation of the molecular weights, the 1938 International Atomic Weights were used. The specific rotations are given for
parentheses.
the D line of sodium and for a temperature of 20° C except where a different wave length is given or a different temperature is noted in
The literature to January 1, 1938, has been covered, and the more important compounds have been included.]

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1 These values are read at 20° C, except where the temperature is specified otherwise in parentheses. ? Values from reference [1] extrapolated to zero time.

[1] F. P. Phelps and F. J. Bates, J. Am. Chem. Soc. 56, 1250 (1934).

REFERENCES

[2] P. A. Levene and W. A. Jacobs, Ber. deut, chem. Ges. 43, 3141 (1910).

[3] P. A. Levene and G. M. Meyer, J. Biol. Chem. 31, 625 (1917).

[4] W. C. Austin and F. L. Humoller, J. Am. Chem. Soc. 55, 2167 (1933); 56, 1153 (1934).

[5] F. L. Humoller, W. F. McManus, and W. C. Austin, J. Am. Chem. Soc. 58, 2479 (1936).

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