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PUBLISHED BY THE ROYAL SOCIETY. 
¥& 
THE RECORD OF THE ROYAL SOCIETY OF LONDON, containing Historical 
Documents and Full Lists of Fellows. 2nd Edition, 1901. Demy 8vo, cloth. Pp. 420. Price Ts. 6d. ‘s 
THE ATOLL OF FUNAFUTI: BORINGS INTO A CORAL REEF AND THE 
RESULTS. 1903. 4to, cloth boards. Pp. 428, with numerous Plates and Diagrams. Price 30s. ; 3 to Fellows, 20s. 
REPORT ON THE PEARL OYSTER FISHERIES OF THE GULF OF MANAAR, © 
By W. A. HERDMAN, F.R.S. With Supplementary Reports by other Naturalists upon the Marine Biology. 
4to, cloth boards. Part I., 1903, Pp. 307, with 27 Plates, Price 20s.; to Fellows, 15s. Part II., 1904, Pp. 300, 
with 37 Plates, Price 20s.; to Fellows, 15s. Part III., 1905, Pp. 384, with 34 Plates, Price 20s.; to Fellows, 15s. 
Part. TV., 1905; Pp-3208 ae 33 Plates, Price 20s.; to Fellows, 15s. Part V. (concluding), 1906, Pp. 452, with 
38 Plates, Price 20s. ; to Fellows, lds. 
REPORTS OF THE SLEEPING SICKNESS COMMISSION OF THE ROYAL 
SOCIETY. Demy 8vo. 
No. I. By Dr. Atpo CasTELuant, Lisa: -Col. Brucg, and Dr. Davip Nasarro. 1903. Price Ts. 6d. 
LE. By Dis2C.{Cumisay, As CasTELiant. and G. C. Low. 1903. Price Ts. 6d. 
», Ill. By Dr. C. Curisty and F. V. THEopacp. 1903. Price 6s, — 
5, IV. By Lieut.-Col. Bruck, Dr. Nasarro, and Capt. GrEIG.* 1903. Price 6s. €d. 
is V. By Dr. NaBarro and Capt. GREIc. 1905. Price 3s. 
», VI. By Capt. Greic and Lieut. Gray (Published by H.M. Stationery Office). 1905. Price 4s. 6d. 
» WII. By Dr. F. W. Morr (Published by H.M. Stationery Office).: 1906. Price 4s. 6d. 
» WIII. By Lieuts. Gray and Tuttocu, Prof. MINCHIN, etc. (Published by H.M. eee 
Stationery Office). . 1907, Price 2s. 6d 
» IX. By Dr. Hopcgs, Capt. Gray, Mr. H. G. PLimmer, etc., with General Index 2 
(Published by H.M. Stationery Office). 1908. Price.ls. 6d. 
REPORTS OF THE COMMISSION FOR THE INVESTIGATION | OF — 
MEDITERRANEAN FEVER. 8vo. 
Part I. By Maj. Horrocks, Staff-Surgeons Gi-mour and SuHaw, and Dr. ZAMMIT. 1905. Out ‘of print. 
Rs Il. By Drow We JOHNSTONE, Fleet-Surgeon BASsETT- SMITH, and. Dr.:J.. W. Hi. ey 
Eyre. 1905. Out of print. 
». Ill. By Col. Bruce, F.R.S., Staff- Surgeon SHaw, Capt. CrawForD KENNEDY, : 
Dr. ZAMMIT, Maj. Horrocks, and Fleet- Surgeon BASSETT-SMITH. 1905. _ Price 2s. 6a 
»  1V. By Staff-Surgeons Gitmour and SuHaw, Maj. Horrocks, Capt. CrRawFrorp 
Kennepy, Dr. Zammit, Fleet-Surgeon. BASSETT-SMITH, and Lieut.-Col.._ 
DaviEs. 1906 Price 3s. 62. 
= V. By Staff-Surgeon Sse Dr. J. W. H. Eyre, and Maj. Horrocks. 190% Price-2s. 62. > ~ 
. VI. By Dr. fea. He Eyre, Maj. McNaucut, Capt. CRawFrorpD KENNEDY, and Se ss 
Dr. Zammit. 1907. Price 3s. 
», VII. By Staff-Surgeon Clayton and Majs. McCuLiocn and WeErr. ‘1907. Price 5s. 
REPORTS TO THE EVOLUTION COMMITTEE OF THE ROYAL SOCIETY. 
Demy 8vo. 
Report 1. By W. BaTEsoN, M.A., F-R.S., and Miss SaunpERS. Pp. 160. 1902. Price 10s. 
Report 2. By W. BaTESON, M.A., F-R.S., Miss SAUNDERS, R. C. PUNNETT, M.a., Sek Mart Attia 
and C. C. Hurst, F.u.s. Pp. 154 1905. Price 7s. 6d. 
Report 3. By W. BaTEson, M.A., F.R.S., Miss E. R. Saunpers, and : - 
R:C; PUNNETT, WisAter ea 63. 1906. Price 2s. 6d. 
Report 4. By the same, with Miss DurHam, L. Doncaster, etc; e.e60, 1908. Price 2s. 6d. 
Contents = PROCEEDINGS, No. A 550. ~ December, 1908, 
Price 2s. 6d. 
Aa OCCLUSION OF THE RESIDUAL GAS AND THE FLUORESCENCE 
OF THE GLASS WALLS OF CROOKES TUBES. By. ALtan-A. CAMPBELL SWINTON .. 453 
NOTE ON TWO RECENTLY COMPILED CALENDARS OF PAPERS OF 
THE PERIOD 1606—1806 IN THE ARCHIVES OF THE ROYAL SOCIETY. ae ASAE: oo 
‘Page 
D.Sc., F.R.S. - 460 
THE CHARGES ON IONS IN GASES, AND THE EFFECT OF. WATER, 
VAPOUR ON THE MOTION OF NEGATIVE IONS. By Prof. Joun S. Towxsenn, F.R.S... .. 464 
MEASUREMENT OF ROTATORY DISPERSIVE POWER IN THE VISIBLE 
AND ULTRA-VIOLET REGIONS OF THE SPECTRUM. By T. Martin Lowry, D. oe Lecturer 
on Physical Chemistry and Instructor in Cry stallography at the Central Technical College a _ 412 
RESULTS OF MAGNETIC OBSERVATIONS AT STATIONS ON THE 
COASTS OF THE BRITISH ISLES, 1907. ze. seaage oe 16s, Pio aie R.N., se of 
Compasses. (Abstract) %. : aes 2 4D 
POTENTIAL GRADIENT IN GLOW DISCHARGES FROM A POINT TO A 
eee ead: W. BispHam, B.A., B.Sc., Research Exhibitioner and former Scholar of Emmanuel 
ollege, Cambridge .. o ss en oh + = or ii ce ie Be =F - =3 
INDEX . a 5 
TITLE, CONTENTS, ETC. 
