58 
The Ph. Belg. Ill contains a table showing* the solubility (in round 
numbers) of chemical medicaments in water, alcohol (90 per cent), 
and ether. 
Holmes, John, discusses: I. The nature of the molecular arrange- 
ment in aqueous mixtures of the lower alcohol and acids of the 
paraffin series. II. Molecular complexity in the liquid state. III. 
Theory of the intermiscibility of liquids. — J. Chem. Soc., Lond., 
1906, v. 89, pt. 2, pp. 1774-1786. 
7. MELTING POINT DETERMINATIONS. 
Riedel’s Berichte (Berl., 1906, pp. 16-21) discusses the determina- 
tion of the melting point of official substances and reviews the litera- 
ture relating to this factor. 
Thomann discusses the importance of melting point determina- 
tions as being indicative of the composition and purity of certain 
substances. He points out that, in view of the decreasing amount of 
manufacturing done in the laboratory of the pharmacy, the amount 
of analytical work must be increased. — Schweiz. Wchnschr. f. Chem. 
u. Pharm., 1906, v. 44, pp. 261-262. 
The Ph. Austr. VIII outlines a definite method for the determina- 
tion of the melting point of the various substances. — Ph. Austr. VIII, 
p. XXV. 
The Pharmacopoeia of Japan gives detailed directions for deter- 
mining the melting point of chemicals and for determining the melt- 
ing point of fats and other similar substances. — Ph. Japon. Ill, 
pp. XXII-XXIII. 
Lenz, IV. (Pharm. Ztg., v. 50, 1031), recommends that in place of 
the rubber bands commonly used for fastening melting point tubes 
to the thermometer a metal band composed of a spiral and a thin 
sheet of some suitable metal, such as German silver, platinum, or ir- 
idium. — Proc. Am. Pharm. Ass., 1906, v. 54, p. 605. 
Wegschneider, R. (Pharm. Journ., May 17, 1906, 319), asserts 
that in the determination of melting points in capillary tubes one 
hardly ever obtains sharp melting points, but more commonly a 
temperature interval within which the substance melts. He is of the 
opinion that in the case of substances which decompose at or below 
their melting point, the exact conditions under which the melting 
point was determined should be recorded. — Ibid., v. 54, p. 606. 
8. BOILING POINT DETERMINATIONS. 
The Ph. Austr. VIII outlines the method to be followed in the 
determination of the boiling point of pharmacopoeial liquids. — Ph. 
Austr. VIII, p. XXV. 
In addition to the determination of the melting point and the boil- 
ing point of substances the Ph. Ndl. IV also prescribes the determi- 
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