[ V ] 
LIST OF ILLUSTRATIONS. 
•Plates 1 and 2. —Mr. A. Norman Shaw on a Determination of the Electromotive 
Force of the Weston Normal Cell in Semi-absolute Volts. 
Plate 3.—Prof. A. Fowler. Bakerian Lecture. —Series Lines in Spark Spectra. 
Plates 4 and 5.—Messrs. C. T. Heycock and F. H. Neville on Dilute Solutions of 
Aluminium in Gold. 
Plates 6 and 7.—Mr. E. G. Bilham on the Spark Spectrum of Nickel under 
Moderate Pressures. 
Plate 8.—Prof. Louis Vessot King on the Convection of Heat from Small Cylinders 
in a Stream of Fluid : Determination of the Convection Constants of Small 
Platinum Wires with Applications to Hot-Wire Anemometry. 
Plates 9 and 10. —Sir William Crookes on Acquired Radio-Activity. 
