PROCEEDINGS

OF THE

ROYAL SOCIETY OF LONDON.

VOL. LXXI.

LONDON:

HARRISON AND SONS, ST. MARTIN'S LANE,

Printers in Ordinary to His Majesty.

LONDON:

HARRISON AND SONS, PRINTERS IN ORDINARY TO HIS MAJESTY,

ST. MARTIN'S LANE.

CONTENTS.

VOL. LXXI.

No. 467.

Magnetic Observations in Egypt, 1893-1901. By Captain H. G.

Lyons, R.E. Communicated by Professor Rücker, Sec. R.S.

Note on the Effect of Mercury Vapour on the Spectrum of Helium.

By Professor J. Norman Collie, F.R.S.

The Seed-fungus of Lolium temulentum, L., the Darnel. By E. M.

Freeman, M.S., University of Minnesota. Communicated by Pro-

fessor Marshall Ward, F.R.S.

On the Effects of Magnetisation on the Electric Conductivity of Iron

and Nickel. By Guy Barlow, B.Sc., Research Fellow of the Univer-

sity of Wales. Communicated by Professor A. Gray, F.R.S.

Influence of Temperature on the Conductivity of Electrolytic Solutions.

By W. R. Bousfield, M.A., K.C., M.P., and T. Martin Lowry, D.Sc.

Communicated by Professor H. E. Armstrong, F.R.S.

No. 468.

On the Measurement of the Bactericidal Power of small Samples of

Blood under Aerobic and Anaerobic Conditions, and on the Com-

parative Bactericidal Effect of Human Blood drawn off and tested

under these Contrasted Conditions. By A. E. Wright, M.D., Pro-

fessor of Pathology, Army Medical School, Netley. Communicated

by Professor J. R. Bradford, F.R.S.

The Colour-physiology of Higher Crustacea. By Frederick Keeble,

M.A., Reading College, Reading, and F. W. Gamble, D.Sc., Owens

College, Manchester. Communicated by Professor S. J. Hickson,

F.R.S.

Observations on "Flicker" in Binocular Vision. By C. S. Sherring-

ton, M.A., M.D., F.R.S. (Thompson-Yates Laboratory of Physiology,

University College, Liverpool)

On the Influence of the Prolonged Action of the Temperature of Liquid

Air on Micro-organisms, and on the Effect of Mechanical Tritura-

tion at the Temperature of Liquid Air on Photogenic Bacteria. By

Allan Macfadyen, M.D. Communicated by Professor James Dewar,

F.R.S.