Abstract
LONDON. Chemical Society, November 18.— Dr. W. A. Tilden, F.R.S., president, in the chair.—The union of carbon monoxide and oxygen, and the drying of gases by cooling, by Mr. A. F. Girvan. A series of experiments with various cooling agents was made, to determine whether aqueous vapour could be so far removed from mixtures of these two gases by cooling that they could no longer be exploded electrically. It was found that after having been cooled to a temperature of —35° the mixture exploded feebly, and that if it had been cooled to below —50° explosion did not occur; whence it, appears that there must be at least one molecule of water in 24,000 molecules of the mixture in order that such mixtures may explode.—Simplification of Zeisel's method of methoxyl and ethoxyl determinations, by Dr. W. H. Perkin, sen., F.R.S. The vertical condenser and washing bulbs are dispensed with, it having been found that the hydriodic acid is completely retained by using a long-necked distilling flask with its side arm arranged to slope slightly upwards. —The rusting of iron, part ii., by Dr. G. T. Moody. The salts which inhibit the formation of “rust” on iron are divisible into two classes, viz. those which are strongly alkaline, and therefore absorb carbon dioxide, e.g. sodium phosphate and borate, and those which are decomposed by carbon dioxide, e.g. sodium nitrite, acetate, and formate. The author is of opinion that the non-formation of “rust” in presence of these salts is due, therefore, to their removal of carbon dioxide from the air, and not, as was suggested by Dunstan, to their property of destroying hydrogen peroxide.—Constitution of ethyl cyanoacetate. Condensation of ethyl cyanoacetate with its sodium derivative, by Messrs. F. G. P. Remfry and J. F. Thorpe.—The action of water and dilute caustic soda solutions on crystalline and amorphous arsenic, by Mr. W. T. Cooke. Amorphous arsenic is dissolved to a minute extent only, by prolonged oebullition of the element in water or aqueous solutions of sodium hydroxide even in presence of air. The crystalline form of the element, on the other hand, is also only slightly soluble in water and caustic soda solutions in presence of inert gases, but in presence of air the solubility is greatly increased.—Note on a double chloride of molybdenum and potassium, by Prof. G. G. Henderson. A description of the method of formation and of the properties of this salt, the composition of which is represented by the formula 3KCl,MoCl3,2H2O, was given.—The action of benzamidine on olefinic-β-diketones, by Dr. S. Ruhemann.—Dissociation constants of trimethylenecarboxylic acids, by Messrs. W. A. Bone and C. H. G. Sprankling?. A comparison of the values of these dissociation constants with those of the corresponding saturated open-chain acids shows that the formation of a closed ring increases the values of these constants.—The elimination of hydrogen bromide from bromo-gem-dimethylsuccinic acid and from bromotrimethyl-succinic anhydride, by Messrs. W. A. Bone and H. Henstock.
Article PDF
Rights and permissions
About this article
Cite this article
Societies and Academies . Nature 69, 142–144 (1903). https://doi.org/10.1038/069142a0
Issue Date:
DOI: https://doi.org/10.1038/069142a0