7 16 SCIENCE PROGRESS 



Oxford University Press General Catalogue, November 191 6. Oxford, London, 

 New York : Humphrey Milford. (Pp. viii + 566.) 



A useful publication designed to assist students in the choice of books, and 

 is compiled so that the nature and price of any book can be rapidly ascer- 

 tained. It includes works on Modern History, Geography, Economics, 

 Philosophy, English and other Modern Classics, Literature of the Ancient 

 World, General Literature, and Natural Science and Medicine. 



ANNOUNCEMENTS 



Royal Astronomical Society. Meetings 5 p.m., April 13, May 11, June 8. 

 Royal Horticultural Society. Lectures at 3 p.m. April 11, 17, 24, May 8, 



22. Also Lectures on June 5, 19. Admission 2s. 6d. 

 Chemical Society. Meetings 4 p.m. April 19, May 3, 10, 17 (Lecture by Mr. A. 



Chaston Chapman), June 7, 21. 



The Institution of Mechanical Engineers. General Meeting 6 p.m., 

 April 20. Graduates' Meetings are temporarily suspended. 



The Advisory Council of the Government's Department of Scientific and 

 Industrial Research have added to the list of their technical Committees a Standing 

 Committee on Glass and Optical Instruments. This Committee appointed a 

 series of Sub-Committees to which various special problems were referred : Raw 

 materials for glass and glass-making— Optical properties of a large range of 

 glasses — General physical and chemical properties of glass and glassware for 

 scientific and industrial purposes — Testing and standardising of glassware — Work- 

 shop technique — X-ray glass apparatus — Optical calculations and lens designing — 

 Optical instruments — Translation of foreign works on optics. They invite manu- 

 facturers who have experienced difficulties requiring investigations for their solution 

 in connection with subjects of glass and optical instruments, or who desire to 

 make suggestions for special researches on these, to communicate in the first 

 instance with the Secretary of the Research Department, Great George Street, 

 Westminster, S.W. 



Printed by Hazett, Watson & Viney, Ld., London and Aylesbury, England. 



