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The following report of the Committee covers the twelve-month period, September 30, 1939 to September 30, 1940.1 Only one change in the table of atomic weights has been adopted, in the case of holmium from 163.5 to 164.94.Carbon and Sulfur.-Moles, Toral and Escribano,2 have redetermined the limiting densities of oxygen, ethylene, carbon dioxide, sulfur dioxide and hydrogen sulfide using an improved volumeter, in which the globes held more than two liters each. The gases were chemically purified and dried, and finally fractionally distilled or sublimed (carbon dioxide). In the following tables the corrected values of Density/Pressure are given. Adsorption corrections, as determined by Crespi, have been applied.

The following report of the Committee covers the twelve-month period, September 30, 1936, to September 30, 1937.1 The following changes (4) Baxter and Hale,

No abstract

The following report of the Committee covers the twelve-month period September 30, 1937, to September 30, 1938.1 Only one change has been made in the table of atomic weights, in the case of phosphorus from 31.02 to 30.98.Carbon.-Moles and Escribano2 have redetermined the densities of oxygen and carbon dioxide at different pressures.