Published by Clay and Sons, Ave Maria Lane. 
CATALOGUE OF SCIENTIFIC PAPEKS, 
COMPILED BY THE ROYAL SOCIETY. 
Yol. 10 (187-1-83). Price 25s., cloth. 32s., half-morocco. Vol. 11, in the Press. 
The back 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. Vol. 9 (1874-83), cloth £1 5s. net; half-morocco, £1 12s. net. 
A reduction of price to Fellows of the Royal Society, 
Published by Kegan Paul, Trench, Trubner, and Co. 
Royal 4to, pp. xiv.—326, cloth. Price 21s. 
OBSEKYATIONS OF THE INTEENATIONAL POLAR EXPEDITIONS. 
1882-1883. 
PORT RAE. 
With 32 Lithographic Folding Plates. 
A reduction of price to Fellows of the Royal Society. 
