IV 
CONTENTS. 
NO. 
XVII. The Electromotive Force of Iodine Concentration Cells with 
One Electrode saturated with Iodine. By A. P. Laurie, 
D.Sc, M.A. Cantab., ..... 
(Issued separately May 11, 1909.) 
XVIII. Cynomacrurws Piriei, Poisson abyssal nouveau recueilli par 
I Expedition Antarctique National e Ecossaise. Note pre- 
liminaire, par Louis Dollo, Sc.D. (Cantab.), For.Mem.G.S., 
C.M.Z.S., a Bruxelles (Musee). ( Presentee par M. R. H. 
Traquair, M.D, F.R.S, V.P.R.S.E.), . . . 316 
(Issued separately May 13, 1909.) - o8 
XIX. On Lagrange’s Equations of Motion, and on Elementary 
Solutions of Gyrostatic Problems. By Professor Andrew 
Gray, F.R.S., . . . . . 327 
(Issued separately May 13, 1909.) 
XX. On Energy Accelerations and Partition of Energy. By 
C. W. Follett. (Communicated by Professor W. Peddie), 349 
(Issued separately May 15, 1909.) 
XXI. The Systematic Motions of the Stars. (Second Paper.) By 
Professor Dyson, . . . . . .376 
(Issued separately May 15, 1909.) 
PAGK 
304 
The Papers published in this Part of the Proceedings may be 
had separately, on application to the Publishers, at the follow- 
ing prices : — 
No. XIII., 
No. XIV, 
No. XV., 
No. XVI., 
No. XVII., 
No. XVIII., 
No. XIX., 
No. XX, 
No. XXL, 
Price 4s. 9d. 
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