CONTENTS. 



MEMOIRS. 



I. On the Resolution of Elementary Substances into their Ultimates 

 and on the Spontaneous Molecular Activity of Radium. By 

 Henry Wilde, D.Sc, F.R.S. With two Tables ... pp, i — 12 



II. Notes on Fossil Plants from the Ardwick Series of Manchester. 

 By E. A, Newell Arber, M.A., F.L.S., F.G.S. 

 Plate I. pp. 1—32 



III. On a Method of Ice Calorimetry. By H. E. Schmitz, 



M.A., B.Sc. pp. I — 20 



IV. Suggestions for a Revision of the Classification of the Polyclad 



Turbellaria. By F. F. Laidlaw, B.A. pp. i — 16 



V. Report on the Recent Foraminifera from the Coast of the 

 Island of Delos (Grecian Archipelago). By Henry Side- 

 bottom. Plates II. — V. pp. I — 26 



(Issued separately February 13th, IQ04.) 



VI. On the Specific Heats and Specific Volumes of Certain Alloys. 



By H. E. Schmitz, M.A., B.Sc pp. i— 8 



{Issued separately March 2nd, 1Q04.) 

 VII. On Phenomena due to Repetitions of Stress, and on a New 



Testing Machine. By Frank Foster, B.Sc. ... pp. i — 20 



{Issued separately March nth, igo4.) 



VIII. The Evolution of Matter as revealed by the Radio-active 



Elements. (The Wilde Lecture.) By F. Soddy, M.A. pp. 1—42 

 (Issued separately March ibth, 1^04..) 



IX. An Interesting Reaction of Copper Salts. By Edmund 



Knecht, Ph.D., F.I.C pp 1—4 



(Issued separately March 17th, IQ04.) 



X. On the Spectrum of the Glow Discharge at Atmospheric 



Pressure. By G. A. PIemsalech. Plate VI. ... pp. i — 11 



{Issued separately March 18th, igo^..) 



XL On a Suitable Arrangement for Determining the Capacity of a 

 Condenser by the Method of Successive Discharges. By H. 

 Morris-Airey, M.Sc, and E. D. Spencer pp. i — 5 



{Issued separately March2ist, 1^04.) 

 XII. On the Rate at which Ions are Generated in the Atmosphere. 



By Arthur Schuster, Ph.D., F.R.S pp. i — 6 



(Issued separately, March 26th, 1Q04.) 



