LONDON. Chemical Society, January 21.—Prof. Emerson Reynolds,., F.R.S., in the chair.—The following papers were communi-. cated:-Researches on silicon compounds. Part viii. Interactions of silicophenylamide with thiocarbimides, by Prof. Emerson Reynolds. Silicophenylamide readily combines with one or two molecules of the thiocarbimides to form crystalline compounds, which dissociate into their generators at ioo° C.; it also reacts with thiocarbimides when heated in sealed tubes, with the formation of silicodiphenylimide and a disubstituted thiocarbamide.—On the relation between the absorption spectra and the chemical structure of cory-daline, berberine and other alkaloids, by Drs. Dobbie and Lauder. It is shown that corydaline and tetrahydrober-"berine, which are known to possess similar constitutions, give absorption spectra which differ in general absorption, but show no specific absorption differences. This is found to be the case generally for related alkaloids, and the authors suggest that Such observations may occasionally be useful in deciding between possible formulae for an alkaloid.— Absorption spectra of laudanine and laudanosine in relation to their chemical constitution, by Drs. Dobbie and Lauder. An application of the results of the foregoing paper to these two alkaloids, which are shown to belong probably to the reduced berberine group.—Phenocydoheptene, by Dr. Kipping and Mr. Hunter. A description of the properties of this hydrocarbon.—The influence of molybdenum and tungsten trioxides on the specific rotations of Mactic acid and potassium Mactate, by Dr. Henderson and Mr. Prentice. These oxides increase the specific rotations of Z-lactic acid and of its potassium salt, probably as the result of the formation of salts of the tartar emetic type.—Estimation of ethyl alcohol in essences and medicinal preparations, by Dr.?.?. Thorpe and Mr. Holmes. The mixture is diluted with water, saturated with sodium chloride and shaken out with light petroleum to remove volatile substances other than alcohol; the latter remaining in the residue is estimated in the usual manner.—Carbon monoxide as a product of combustion of the Bunsen burner, by Dr. Thorpe. A laboratory burner consuming 6 cubic feet of coal gas per hour under 0.95 inch pressure evolves 0.022 cubic foot of carbon monoxide when burnt under a sand bath at such a height that the inner cone just impinges on the? etal of the bath.—The following papers are descriptive of the compounds mentioned, and are not of general interest:- Derivatives of jS-resorcylic acid and of protocatechuic acid, by Dr. W. H. Perkin, jun., and Mr. Schiess.—Synthesis of iV-ethyl-, iV-methyl- and JV-benzyl-benziniinoethers, by Dr. Lander.—The condensation of phenyl ethyl ketone with benzalacetophenone and of acetophenone with benzalpro-piophenone, by Dr. Abell.—Synthesis of?: 3: 5 triphenyi-2: 4-dimethylcycZopentane and of 1:3: 5-triphenyl-2-methyl-cyc/opentane, by Dr. Abell.—Formation of carbazoles by the interaction of phenols, in the orthoketonic form, with aryl-hydrazines, by Prof. Japp and Mr. Maitland. (1) Dimorphism of o-methylanhydracetonebenzil. (2) The oxidation products of the methyl homologues of anhydracetone-benzil, by Prof. Japp and Mr. Michie.—Action of hypo-bromites on amides, by Dr. La? worth and Mr. Nicholls. -Derivatives of menthyl cyanoacetate, by Messrs. Bowack and Lapworth.—The influence of nitro-groups on the reactivity of halogen derivatives of benzene, by Dr. Lap-worth. A restatement of the view that the reactivity of the halogens in ortho- and />ara-halogenated nitrobenzenes is due to the assumption of the elements of a molecule of water by the nitro-group, with subsequent intramolecular changes, leading to the production of a tautomeric form of a nitrophenol with the loss of a molecule of a haloid acid.