CONTENTS. 
VOL. XIV. 
PAGE 
A relation between the velocity and volume of organic ions in aqueous 
solutions. By G. A. Carse and T. H. Laby. (Communicated by 
Prof. J. J. Thomson) 1 
Note on a Collection of Oribatidae from British Guiana. By C. War- 
burton and N. D. F. Pearce 13 
The Radioactivity of the Alkali Metals. By Norman R. Campbell 
and Alexander Wood 15 
On the Maturation of the Germ-Cells in the Sawfly , Nematus ribesii 
(Third Note). By L. Doncaster 22 
A delicate reaction for Carbohydrates. By H. J. H. Fenton . . 24 
The Solubility of Stereoisomerides in Optically Active Solvents. By 
H. 0. Jones 27 
The influence of spectral colours on the sporulation of Saccharomyces. 
By J. E. Purvis and G-. . R. Warwick 30 
The influence of a strong magnetic field on the spark spectra of titanium , 
chromium and manganese. By J. E. Purvis .... 41 
On rhe Specific Heat of Gases at constant volume and high pressure. 
By W. A. Douglas Rudge 85 
Estimation of Copper. By W. H. Foster. (Communicated by H. O. 
Jones) 90 
The procession of Cnetliocampa pinivora, Treitschke. By H. H. Brindley 98 
Electrification produced by heating Salts. By Prof. J. J. Thomson . 105 
On Secondary Rontgen Radiation. By Prof. J. J. Thomson . . 109 
A New Chemical Test for “ Strength ” in Wheat Flour. By T. B. Wood 115 
Prelim Mary Note upon the Presence of Phosphorus in Crystalline Egg 
Albumin. By Miss E. G. Willcock and W. B. Hardy . . 119 
Notes on the Proportion of the Sexes in Dogs. By W. Heape . . 121 
The Natural Units of Mass, Length and Time. By H. C. Pocklington 152 
Some New Platinocyanides. By L. A. Levy. (Communicated by 
Dr Fenton) 159 
A study of the Navicular in the Human and Anthropoid Foot. By 
T. Manners-Smith. (Preliminary note.) (Communicated by 
Professor Macalister) 161 
A Series of Substituted Bromanilines. By J. R. Hill. (Communicated 
by H. 0. Jones) 166 
Some observations on Complex Carbonates. By T. B. Wood and 
H. 0. Jones 171 
