Sold by Harrison and Sons, St. Martin’s Lane. 
Demy 8vo, pp. 427. Price 12s. Qd. 
THE EECOED OF THE EOYAL SOCIETY. 
Second Edition. 1901. 
Containing an Account of the Foundation, History, &c., of the Society, with a Chronological List and 
Alphabetical Index of the Fellows from the Foundation. 
Ready shortly. Demy 8vo, pp. 265. Price 6s. 
THE YEAR-BOOK OF THE EOYAL SOCIETY, 1903 . 
Principal Contents:—List of Fellows, Committees, &c.; Statutes and Regulations; Business of the 
Society during 1902, including Anniversary Meeting with President’s Address, Council’s Report, 
and Treasurer’s Accounts ; Arrangements for 1903; Obituary Notices of Fellows deceased. 
PHILOSOPHICAL TEANSACTIONS. 
Series A. Containing Papers of a Mathematical or Physical Character. 
VoL. 199 (1902), Price £1 6s. 
VoL. 200 (1903), Price £2 3s., with 39 Plates. 
Series B. Containing Papers of a Biological Character. 
VoL. 193 (1900), Price £1 5s., with 11 Plates. 
VoL. 194 (1901), Price £3, with 49 Plates. 
Pdblisued by Clay and Sons, Ave Maria Lane. 
CATALOGUE OF SCIENTIFIC PAPEES, 
COMPILED BY THE ROYAL SOCIETY. 
The volumes on sale as follows Vols. 1-6 (1800-63), cloth (vol 1 in half-morocco) £4 net; half- 
morocco, £5 5s. net. Vols. 7, 8 (1864-73), cloth, £1 11s. 6d. net; half-morocco, £2 5s. net. Single 
vols., cloth, 20s.; half-morocco, 28s. net. Vols. 9, 10 (1874-83), cloth, £1 5s. net; half-morocco, 
£1 12s. net. Vol. 11 (1874-83), cloth, £1 6s. net; half-morocco, £1 12s. net. Vol. 12 (Supple¬ 
mentary, 1800-1883), cloth, £1 5s. net; half-morocco, £1 12s. net. 
A reduction of price to Fellows of the Royal Society. 
Pdblished by Kegan Paul, Trench, Trobner and Co. 
A few copies at the reduced price of £1. Is. (published at £3). 
Royal 4to, pp. iv. 936, cloth. TYith 51 Lithographic and Photographic Plates. 
A MONOGEAPH OF THE HOENY SPONGES. 
By R. von LBNDENFELD. 
A further reduction of price to Fellows of the Royal Society. 
Published by Kegan Paul, Trench, Trobner and Co. 
In 1 vol., 4to. Pp. 500. With 6 Chromolithogi’aphs of the remarkable Sunsets of 1883 and 
40 lilaps and Diagrams. 
THE EEUPTION OF KEAKATOA AND SUBSEQUENT PHENOMENA. 
Report of the Krakatoa Committee of the Royal Society. 
Edited by G. J. SYMONS, F.R.S. 
Price 30s. To Fellows of the Royal Society and Royal Meteorological Society, 20s. 
Published by Kegan Paul, Trench, Trobner, and Co. 
Royal 4to, pp. xiv.—326, cloth. Price 21s. 
OBSEEVATIONS OF THE INTEENATIONAL POLAE EXPEDITIONS. 
1882-1883. 
FORT RAE. 
With 32 Lithographic Folding Plates. 
A reduction of price to Fellows of the Royal Society. 
Continental Agents for the publications of the Royal Society, Messrs. Friedlandee and Son, Berlin. 
