PROCEEDINGS

OF THE

ROYAL SOCIETY OF LONDON.

From March 24, 1881, to June 16, 1881.

VOL. XXXII.

LONDON:

HARRISON AND SONS, ST. MARTIN'S LANE,
Printers in Ordinary to Her Majesty.

MDCCCLXXXI.

تا

R-7

LONDON:

HARRISON AND SONS, PRINTERS IN ORDINARY TO HER MAJESTY, ST. MARTIN'S LANE.

CONTENTS.

VOL. XXXII.

No. 212. March 24, 1881.

THE CROONIAN LECTURE.-Observations on the Locomotor System of

Echinodermata. By George J. Romanes, M.A., F.R.S., and Professor

James C. Ewart, M.D....

The Functional Relations of the Motor Roots of the Brachial and Lumbo-

Sacral Plexuses. By David Ferrier, M.D., F.R.S., Professor of

Forensic Medicine, and Gerald F. Yeo, M.D., F.R.C.S., Professor of

Physiology in King's College

On the Histology and Physiology of the Pepsin-forming Glands.. By J.

N. Langley, M.A., Fellow of Trinity College, Cambridge

March 31, 1881.

Page

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12

20

23

On the Coefficients of Expansion of the Di-iodide of Lead, PbI2, and of

an Alloy of Iodide of Lead with Iodide of Silver, PbI¿AgI. By G. F.

Rodwell, F.R.A.S., F.C.S., Science Master in Marlborough College

Permanent Molecular Torsion of Conducting Wires produced by the

Passage of an Electric Current. By Professor D. E. Hughes, F.R.S..... 25

On the Tendinous Intersection of the Digastric. By G. E. Dobson,

M.A., M.B........

Note on Protagon. By Henry E. Roscoe, LL.D., F.R.S.

April 7, 1881.

On the Minute Structure of the Lung of the Newt with especial reference

to its Nervous Apparatus. By William Stirling, M.D., Sc.D., Regius

Professor of the Institutes of Medicine (Physiology) in the University

of Aberdeen

On an Electrodynamic Balance. By H. Helmholtz, For. Mem. R.S.,

Professor of Physics in the University of Berlin

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