VOL. 8, NO. 8
CORRESPONDENCE
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VII. MOmEY, HENRY, "Bernard Palissy, Potter," London, 1852. BRANTH "Le~ Connetable ~, de Moutmorency," Vol. IV, xxii. D'AWIGNE, THEODORE AGRIPPA. ''L3HistoiTeUniverselle," Partie 111, Livre 111, 1589.
LAMARTINE, "Civilisateur." DUPLESSY, CAMILLE, Reccui des travaur de la Soc. d'Agricu1. d'Agen. VII. des sciences nat.," 11. C u v ~ ~"Histoire n, "Francois Grude. sieur de la Croix du Maine." Bibliotheaue francaise. Paris.
1584.
LIESTOKE, PIERRE DE, MS. Bibliotheque nacionnle. Paris
THE CONCEPT OF THE POUND-MOLECULAR-VOLUMECORRECTION DEAREDITOR: In an article dealing with "The Concept of the Pound-MolecularVolume" published in the JOURNAL OF CHEMICAL EDUCATION, July, 1930, page 1659, the statement is made that the relationship that the ounce molecular volume of a gas is equal to 22.4 cubic feet was discovered by Dr. T. W. Richards. I wish to call attention to the fact that credit for the discovery of this relationship should be given to Dr. Joseph W. Richards, one-time professor of metallurgy a t Lehigh University. In his book entitled "Metallurgical Calculations" (McGraw-Hill Company, 1906) this relationship is set forth on pages 3 and 4. 0. F. STAFFORD UNIVERSITY OF OREGON EUGENE. OREGON
The type of buret support shown in Figure 3 of Pagel's article [J. CHEM. EDUC.,8, 161 (Jan., 1931)] can be easily modified to give the advantage of a constant level buret. To do this the filling tube is drawn out to a tapering capillary long enough to extend to the zero point of the buret and with an opening of about 1 mm. in diameter, carefully fire-polished. This filling tube is then adjusted
