IV 
CONTENTS. 
NO. PAGE 
XXYI. On the Histological Changes in the Liver and Kidney after 
Chloroform administered by Different Channels. By 
G. Herbert Clark, M.B., D.P.H. (From the Physio- 
logical Laboratory of the University of Glasgow.) (With 
Three Plates), . . . . . .418 
{Issued separately July 9, 1909.) 
XX VII. On the Effect of Internal Friction in Cases of Compound 
Stress. By G. H. Gulliver, B. Sc., A. M. I. Mech. E., 
Lecturer in Engineering in the University of Edinburgh, . 427 
{Issued separately July 9, 1909.) 
XXVIXI. On the Friction at the Extremities of a Short Bar sub- 
jected to a Crushing Load, and its Influence upon the 
Apparent Compressive Strength of the Material. By 
G. H. Gulliver, B. Sc., A. M. I. Mech. E., Lecturer in 
Engineering in the University of Edinburgh, . . 432 
{Issued separately July 16, 1909.) 
XXIX. On Group-Velocity and on the Propagation of Waves in a 
Dispersive Medium. By George Green, M.A., B.Sc., 
Assistant to the Professor of Natural Philosophy in the 
University of Glasgow. ( Communicated by Professor 
A. Gray, F.R.S.), ...... 445 
{Issued separately July 16, 1909.) 
XXX. On a Simple Radioscope and a Radiometer for showing and 
measuring Radioactivity. By Dr John Aitken, F.R.S., . 471 
{Issued separately 1909.) 
The Papers published in this Part of the Proceedings may be 
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