PHILOSOPHICAL TRANSACTIONS 
OF THE 
ROYAL SOCIETY OF LONDON. 
Series A, Vol. 214. Pp. 295-317. 
ON THE LUNAR DIURNAL VARIATION OF THE EARTH’S 
MAGNETISM AT PAVLOVSK AND POL A (1897-1903). 
BY 
S. CHAPMAN, B.A., D.Sc., 
FELLOW OF TRINITY COLLEGE, CAMBRIDGE, AND CHIEF ASSISTANT AT THE ROYAL 
OBSERVATORY, GREENWICH. 
LONDON: 
PUBLISHED BY THE ROYAL SOCIETY, 
AND SOLD BY HABKISON AND SONS, ST. MAETIN’S LANE. 
DTJLAU AND CO., LTD., 37, SOHO SQUAEE, W. 
1914. 
A 517. 
26.9.14 
Price One Shilling and Sixpence. 
