Abstracts from the Bulletin of the American Physical Society, showing the succession of experiments giving proof of a magnetic current.

Natrium, Kalium, Lithium, Rubidium and Casium', by Ivar Molktelhausen. Extract from Handbuch der Technicschen Elektrochemie, Band III

Quelgues données sur les activités du Water Pollution Research Board, London', by Robert Robertson. A paper read at the 17th Congress of Industrial Chemistry.

War development of explosives', by Robert Robertson. A paper read at a weekly meeting of the Royal Institution of Great Britain.

X-ray studies of the porphins', by Ida Woodward. Reprinted from the Journal of the Chemical Society.

Letters from Arthur Fairbourne to Sir Robert Robertson.

Temperature variation of diffuse scattering of X-rays by crystals', by M. Born and K. Lonsdale. Reprinted from Nature, vol. 150.

Chemistry and the State', by Robert Robertson. A presidential address delivered to the Chemistry section of the British Association.

Mr William Rintoul O.B.E.,' by Robert Robertson. An obituary reprinted from Nature, vol. 138.

Ultrasonic velocities in some vegetable oils', by M. Pancholy, A. Pande and S. Parthasarathy. Reprinted from the Journal of Scientific and Industrial Research, vol. 3, no. 3.

Letters from R.C. Farmer to Sir Robert Robertson.

Second report of the committee on contact catalysis', by Wilder D. Bancroft. Reprinted from the Journal of Physical Chemistry, vol. 27

The evolution of nitrogen peroxide in the decomposition of guncotton', by Robert Robertson and Sidney S. Napper. Reprinted from the Transactions of the Chemical Society, vol. 91.

A new method for the determination of nitrogen peroxide', by J.B. Willey and S.G. Foord. Reprinted from the Proceedings of the Royal Society, vol. 135

A group of papers to be read at a symposium of the utilisation of coal, arranged by the British Science Guild

Ionic equilibria across semi-permeable membranes', by F.G. Donnan and A.J. Allmand. Reprint from Transactions of the Chemical Society, vol. 105

A short résumé of investigations on membrane equilibria and membrane potentials', by F.G. Donnan. Reprinted from Bulletin of the National Research Council, no. 69. Washington D.C.

The physical laboratory at the National Gallery', by F.I.G. Rawlins. Reprinted from Science Progress, no. 118

Bandspektern und Stereochemie, Zusammfassung der Ergebnisse Grundlagan und Probleme', by R. Mecke. Separatadbruck aus Stereochemie, Leipzig

Steam Generation; purification of chimney gases'. Paper cutting from Trade and Engineering