Preservation of leather bookbindings', by R.W. Frey and F.P. Veitch. Leaflet no. 69 of the United States Department of Agriculture.

A record of the education and work of William A. Caldwell, with copy correspondence, c.July 1930, between Caldwell, Littlehampton, and the Siamese Legation, London, relating to an appointment in Siam.

A new OH bond in a carboxylic acid', by J.J. Fox and A.E. Martin. Reprinted from Nature, vol. 143

The twilight zone of matter', by A. Findlay. A lecture presented before the 70th meeting of the American Chemical Society, L.A., California, 3-8 August 1925. Reprinted from Industrial and Engineering Chemistry, vol. 17, no. 9

Reaction kinetics and the Walden inversion', by W.A. Cowdrey and others. Reprinted from Nature, vol. 138.

The torsional flexibility of aliphatic chain molecules', by Alex. Müller. Reprinted from the Proceedings of the Royal Society of London, Series A, no. 956, vol. 174.

A.H. Davies, Strawberry Hill, Middlesex to Sir Robert Robertson. Asks him to give a testimony on his behalf for an application for a post with the War Department staff for scientific research. With two copies of Sir Robert's testimonial.

Science in chains', by R. Gregory. A Macmillan war pamphlet, no. 12.

Photographie intrarouge - Methodes et applications', by Pol Mollet, Extrait du Bulletin de la société Chemie de Belgique, Tome 46

A new type of motion for constant deviation prisms', by Henry de Laszlo. Reprinted from The Journal of Chemical Instruments, vol. VII, no. 9.

Integral analysis and the phenomena of life', by F.G. Donnan. Reprint of Acta Biotheoretica, Series A, vol. II, Part 1

[Sir Robert Robertson] to [Sidney John] Worsley, University of London. Testifies in support of an application by Dr Henry Francis Harwood for a readership in analytical chemistry. With copy of the application.

Ausbau de Ultrarotohotographie' by Czerny und Mollet. A page from a reprint from Zeitschrift für technisce Physik, Nr. 12

X-ray investigation of the structure transition of methane at the point', by Adolph Schallamach. Reprinted from the Proceedings of the Royal Society of London, Series A, no. 947, vol. 171.

Application by C.J. Goodwin for active membership of an unnamed body, naming Sir Robert Robertson as a referee. 127

Rubber', by T.R. Dawson. Reprinted from the Reports of progress of applied chemistry, vol. XVIII

Treatment of sewage and certain trade waste waters by a new system of alternating double filtration', by A. Parker. A proof copy of a paper read at a joint meeting of the Institution of Chemical Engineers and the Chemical Engineering Group.

A copy of the application by Herbert William Cremer for the Ramsay Memorial Chair of Chemical Engineering, University College, London.

Metals in the service of human life and industry', by Sir Harold Carpenter. The annual research and development lecture of the British Science Guild

Hydrometers and hydrometry', by V. Stott. A paper read to the World Petroleum Congress, organised by the Institution of Petroleum Technologists