CONTENTS. 



VOL. XV. 



PAGE 



The Laws of Mobility and Diffusion of the Ions formed in Gaseous Media. 



By E. M. Wellisch. (Communicated by Sir J. J. Thomson) . 1 

 The Radioactivity of Rubidium. By Norman Campbell . . .11 

 Jn the Free Pressure in Osmosis. By L. Vegard. (Communicated by 



Sir J. J. Thomson.) (Two figs, in Text) .... .13 



Therapeutic Inocidation for Generalised Bacterial Infections. By L. 



Noon. (Communicated by Professor G. Sims Woobhead.) (Six 



figs, in Text) 24 



In the examination of living leucocytes in vitro. By Constant Ponder. 



(Communicated by W. E. Dixon.) (Two figs, in Text) ... 30 

 On the Relation between Ionization and Pressure for Rontgen Rays in 



different Gases. By J. A. Crowther. (Communicated by Sir J. J. 



Thomson.) (Two figs, in Text) 34 



On the Relative Ionization produced by Rontgen Rays in different Gases. 



By J. A. Crowther. (Communicated by Sir J. J. Thomson) . 38 

 The Relationship between Hitman and Bovine Tiiberculosis. By Professor 



G. Sims Woodhead 40 



The radiation of various spectral lines of neon, heliuin and sodium in a 



magnetic field. By J. E. Purvis 45 



The transmission of Trypanosoma lewisi by fleas and lice. By Professor 



G. H. F. NUTTALL ^3 



The presence of anticoagidin in the salivary glands of Argas persicus. 



By Professor G. H. F. Nuttall 53 



The mode of action of specific substances. By W. E. Dixon and 



P. Hamill . " 54 



The action of specific substances in toxaemia. By W. E. Dixon and 



W. H. Harvey 54 



The Migration Constants of Dilute Solutions of Hydrochloric Acid. By 



C. Chittock. (Two figs, in Text) 55 



On the Carriers of the Positive Charges of Electricity emitted by hot ivires. 



By Sir J. J. Thomson 64 



