iv CONTENTS OF VOL. XIX.—FIFTH SERIES. 
Page 
Profs. A. W. Reinold and A. W. Riicker on the Influence of 
an Electric Current in Modifying the Rate of Thinning of a 
Taquid Filta. @ 3¢... 2S ee ea: Oe ee 94 
Prof. G. F. Fitzgerald on the Rotation of the Plane of Polari- 
zation of Light by Reflection from the Pole of a Magnet .. 100 
Dr. C. R. Alder Wright and Mr. C. Thompson on the Determi- 
nation of Chemical Affinity in terms of Electromotive Force. 
Part UX. oie i. oma ieee 102 
Prof. E. Edlund’s Observations on the Behaviour of Electricity 
im arefied Air) 421 Vee tak Oe. eo 125 
Mr. 8. Tolver Preston on some Electromagnetic Experiments of 
Faraday and Plucker. .(Plate Il.) 2.7... : 22s en eee 131 
Notices respecting New Books :— 
Mr. A. Gray’s Absolute Measurements in Electricity and 
Magnetisin a+. ss. Ge See «woe 9, to 141 
Mr. R. EH. Day’s Exercises on Electrical and Magnetic 
MieaSUPEMeNG. iéo.4'iri. Sickie ee ee oy oe ee 142 
Mr. 8. Lupton’s Numerical Tables and Constants...... 142 
Proceedings of the Geological Society: — 
Prof. C. Lloyd Morgan on the South-western Extension 
of the Clitton Fault’ i.) 5.00.2. 2 143 
Mr. G. Hughes on some West-Indian Phosphate Deposits. 144 
Mr. J. J. Harris Teall on the Metamorphism of Dolerite 
into (Elornblende-sehist. 2 752. 2. - ja4.55e eee 145 
Captain F. W. Hutton’s Sketch of the Geology of New 
Aaa” Gi. epi geese hein ee ae Sa ene eee Cee 146 
Mr. T. Mellard Reade on the Drift-deposits of Colwyn Bay. 147 
A new Method of Determining the Constant of Gravitation, 
by A. Wonie and. Richarze. 3.00. 3. oe 148 
Results for Use in Calculations with Manometers with Com- 
pressed Air, by Hi. 7H. Amagatiy 22050 0. 2. a 150 
On Gas-engine Indicator-diagrams ..................0005 152 
NUMBER CXVIIT.—MARCH. 
Prof. O. J. Lodge on the Seat of the Electromotive Forces in 
the: Voltaie Cells. .4 ah eeinek ss cece Bo eee eee 153 
Dr. Pliny Earle Chase on some Principles and Results of 
Elarmonic: Motions. nai .v.citele «wel. ve pete ee 190 
Dr. C. R. Alder Wright and Mr. C. Thompson on the Determi- 
nation of Chemical Affinity in terms of Electromotive Force. 
2 Part DXi) ofa Pek eRRieY G ening 8 a Se ee 197 
Mr. S. Tolver Preston on some Electromagnetic Experiments. 
—No. II. Diverse views of Faraday, Ampére, and Weber. 215 
Mr. A. M. Worthington on Prof. Edlund’s Theory that a 
Vacuum is a Conductor of Blectricity...... //2) 2.25 see 218 
Dr. J. Wilsing on the Application of the Pendulum to the 
Determination of the Mean Density of the Earth 
