The results of Cooper and Maass on the density of carbon dioxide (Second International Report) and of Moles and Salazar (Third International Report) on carbon monoxide give slightly lower values, 12.0054 and 12.006, respectively. Until further confirmation of a higher value has been obtained, it seems inadvisable to make a change in the value in the table of atomic weights.Nitrogen.-Moles and Batuecas4 correct their results for the density of ammonia previously published (see Report for 1931). The corrected densities are
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