

CONTENTS. 



MEMOIRS. page 



Experiments on the Relation between Uniform Stress and Permanent 

 Strain in Wrought-iron and Steel. By T. E. Stanton, B.Sc, 

 Demonstrator in the Whitworth Engineering Laboratory, Owens 

 College, Manchester. Communicated by Professor Osborne 

 Reynolds, F.R.S. 2 



Some Aspects of Town Air as contrasted with that of the Country. By 

 G. H. Bailey, D.Sc, Ph. D 11 



On a New Sporiferous Spike from the Lancashire Coal Measures. By 

 Thomas Hick, B.A., B.Sc, Assistant Lecturer in Botany, Owens 

 College, Manchester, and James Lomax ... 22 



Preliminary Experiments on the Latent Heat of Steam at ioo°C. By 

 P. J Hartog, B.Sc. (Lond, and Vict.), Assistant Lecturer and late 

 Berkeley Fellow in the Owens College, and J. A. Harker, D.Sc. 

 (Tubingen), Berkeley Fellow in the Owens College. Communicated 

 by Professor Arthur Schuster, Ph.D., F.R.S 37 



General, Morphological, and Histological Index to the Author's Collective 

 Memoirs on the Fossil Plants of the Coal Measures. Part III. By 

 William Crawford Williamson, LL.D., F.R.S., &c, Foreign 

 Member of the Royal Swedish Academy ; Corresponding Member of 

 the Royal Society of Gottingen 54 



Notes on Wulfenia Carinthiaca^ Jacquin. By .-James Cosmo Melvill, 



M.A., F.L.S 75 



On the K-partitions of the R-gon. By the Rev. Thos. P. Kirkman, 



M.A., F.R.S 109 



On the Osmotic Pressure of Solutions of Finite Concentration. By 

 Thomas Ewan, B.Sc, Ph.D.... 130 



On the Treatment of Sewage with Basic Per-Salts of Iron under varying 



conditions. By Harry Grimshaw, F.C.S 143 



An Analysis of the Electro-Motive Force and Current Curves of a Wilde 

 Alternator, under various conditions. By Julius Frith, Hegin- 

 bottom Physical Scholar of the Owens College. Communicated by 

 Arthur Schuster, Ph.D., F.R.S 151 



