CONTENTS 
OF VOL. 167. 
PART I. 
I. On the Determination of Verdet’s Constant in Absolute Units. By J. E. H. Gordon, 
B.A., Gonville and Caius College , Cambridge. —1st and 2nd Memoirs. Commu- 
nicated by J. Clerk Maxwell, F.B.S page 1 
II. The Calculus of Chemical Operations; being a Method for the Investigation, by 
means of Symbols , of the Laws of the Distribution of Weight in Chemical Change. 
— Part II. On the Analysis of Chemical Events. By Sir B. C. Brodie, Bart., 
F.B.S. , late Professor of Chemistry in the University of Oxford 35 
III. On the Structure of a Species of Millepora occurring at Tahiti, Society Islands. 
By H. N. Moseley, Fellow of Exeter College, Oxford, Naturalist to the 
1 Challenger ’ Expedition. Communicated by Professor Sir C. Wyville Thomson, 
F.B.S., Director of the Civilian Scientific Staff 117 
IV. A Contribution to Terrestrial Magnetism; being the Becord of Observations of 
the Magnetic Inclination, or Dip, made during the Voyage of H.M.S. ‘ Iron Duke'' 
to China and Japan, &c., 1871-75. By Vice-Admiral Sir Charles Shadwell, 
K.C.B., F.B.S. 137 
V. Further Besearches on the Deportment and Vital Persistence of Putrefactive and 
Infective Organisms from a Physical point of View. By John Tyndall, D.C.L., 
LL.D., F.B.S. . 149 
