- PHILOSOPHICAL TRANSACTIONS 
1906 —1908. | 
- SERIES A. CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL 
_ ss CHARACTER. | : 
7 s Vol. 207 (1907). Pp. 602. With 9 Plates. Price £1 13s. 6d. 
: Vol. 208 (1908). Pp. 530. With 33 Plates. Price £1 18s. 6d. 
_ SERIES B. CONTAINING PAPERS OF A BIOLOGICAL CHARACTER. 
Vol. 198 (1906). Pp. 508. With 31 Plates. Price £2 Is. Od. 
Vol. 199 (1908). Pp. 428. With 37 Plates. Price £1 16s. Od. 
SOLD BY HARRISON & SONS, 45, ST. MARTIN’S LANE, W.C. 
RECENT PAPERS IN THE ‘PHILOSOPHICAL TRANSACTIONS.’ 
Sold separately by Dulau & Co., 37, Soho Square, London, W. 
A. 444, ON-THE NATURE OF ‘THE STREAMERS IN THE ELECTRIC SPARK. 
By S. R. MILNER, D.Sc. (Lond.), Lecturer in Physics in the University of Sheffield. 
Pp. 17; 3 Plates. Price 2s. 
| A. 445. EUTECTIC RESEARCH. No. 1. THE ALLOYS OF LEAD AND TIN. By 
WALTER ROSENHAIN, B.A., B.C.E., with P. A. TUCKER (from the National - 
Physical Laboratory). Pp. 34; 5 Plates. Price 3s. 6d. 
__A. 446. THE EMISSION AND TRANSMISSION OF RONTGEN RAYS. By G. W. C. 
KAYE, B.A. (Cantab.), B.Sc. (Lond.), A.R.C.Sc., Associate- Member of the Institution of 
Electrical Engineers, Trinity College, Cambridge. Pp. 29. Price 2s. 
A. 447. MEMOIR ON. THE THEORY OF THE PARTITIONS OF NUMBERS.— 
PART IV. ON THE PROBABILITY THAT THE SUCCESSFUL CAN- 
-DIDATE AT AN ELECTION BY BALLOT MAY NEVER AT ANY TIME 
HAVE FEWER VOTES THAN THE ONE. WHO IS UNSUCCESSFUL ; ON 
A GENERALISATION OF THIS QUESTION ; AND ON ITS CONNEXION 
WITH OTHER QUESTIONS OF PARTITION, PERMUTATION, AND 
COMBINATION. By Major P. A. MACMAHON, F.R.S. Pp. 23. Price Is. 6d. 
A. 448. ON THE OSMOTIC PRESSURES OF AQUEOUS SOLUTIONS:OF CALCIUM 
FERROCYANIDE.—PART I. CONCENTRATED SOLUTIONS. By the Earl 
of BERKELEY, F.R.S., E. G. J. HARTLEY, B.A. (Oxon.), and C. V. BURTON, 
D.Sc. (Lond.). Pp. 27, Price 2s. 
A, 449. THE EFFECT OF PRESSURE UPON ARC SPECTRA. | No. 2.--COPPER, 
A 4000 to A 4600. By W. GEOFFREY DUFFIELD, D.Sc., Honorary Research 
Fellow in Physics at the University of Manchester, Mackinnon Student of the Royal Society. 
Pp:22:; 2 Plates. . Price‘2s, 
B. 264. DESCRIPTION OF THE BRAIN OF MR. CHARLES BABBAGE, F.R.S. 
_ (Hunterian Museum, Royal College of Surgeons.) By Sir VICTOR HORSLEY, 
ERS. RCS: “Pp 15:5 (Plates, > Price.2s, 
B. 265. ON THE STRUCTURE OF SIGILLARIA SCUTELLATA, BRONGN., AND 
OTHER EUSIGILLARIAN STEMS, IN COMPARISON WITH THOSE OF 
OTHER PAL/EOZOIC LYCOPODS. By E. A. NEWELL ARBER, M.A., 
F.L.S., F.G.S., Trinity College, Cambridge, University Demonstrator in Paleeobotany ; and 
HUGH H. THOMAS, B.A., formerly Scholar of Downing College, Cambridge. Pp. 34; 
: 3 Plates. Price 2s. 6d. 
B. 266. ON THE PRESENT DISTRIBUTION AND ORIGIN OF THE CALCAREOUS 
CONCRETIONS IN COAL SEAMS, KNOWN AS “COAL BALLS.” By 
M. C. STOPES, D.Sc. Lond., Ph.D. Munich, Lecturer at Manchester University ; and 
D. M.S. WATSON, B.Sc. Manchester University. Pp. 52; 3 Plates. Price 3s. 6d. 
B. 267. ON METHODS FOR THE CONTINUOUS (PHOTOGRAPHIC) AND 
. QUASI-CONTINUOUS REGISTRATION OF THE DIURNAL CURVE OF 
ae THE TEMPERATURE OF THE ANIMAL BODY. By ARTHUR 
ED ry GAMGEE, M.D., F.R.C.P., F.R.S., Hon. LL.D. Edin., Hon. D.Sc. Manch., Emeritus 
Si aes Professor of Physiology in the University of Manchester. Pp. 22; 2 Plates. Price 2s. 
