V 



No. 470. 



Page 



An Experimental Determination of the Variation of the Critical 

 Velocity of Water with Temperature. By E. G. Coker, M.A. 

 (Cantab.), D.Sc. (Edin.), Assistant Professor of Civil Engineering, 

 and S. B. Clement, B.Sc., Demonstrator of Civil Engineering, both 

 of McGill University, Montreal. Communicated bv Professor 

 Osborne Reynolds, F.R.S 1 152 



Isomeric Change in Benzene Derivatives. — The Interchange of Halogen 

 and Hydroxyl in Benzenediazonium Hydroxides. By K. J. P. 

 Orton,Ph.D., M.A., St. John's College, Cambridge, Demonstrator of 

 Chemistry, St. Bartholomew's Hospital. Communicated by Pro- 

 fessor H. E. Armstrong, F.R.S 153 



On certain Properties of the Allovs of the Gold-Silver Series. By the 

 late Sir W. C. Roberts- Austen, K.C.B., D.C.L., F.R.S., and T. Kirke 

 Rose, D.Sc. (Plate 3) 161 



Abnormal Changes in some Lines in the Spectrum of Lithium. By 

 Hugh Ramage, B.A., St. John's College, Cambridge. Communicated 

 by Professor G. D. Liveing, F.R.S 164 



An Error in the Estimation of the Specific Gravity of the Blood by 

 Hammerschlag's Method, when employed in connection with Hydro- 

 meters. Bv A. G. Levy, M.D. (London). Communicated by Sir 

 Victor Horsley, F.R.S 171 



Quaternions and Projective Geometry. By Charles J. Joly, F.T.C.D., 

 Royal Astronomer of Ireland. Communicated by Sir Robert S. 

 Ball, F.R.S ; 177 



The Stability of the Pear-shaped Figure of Equilibrium of a Rotating 

 Mass of Liquid. By G. H. Darwin, F.R.S., Plumian Professor and 

 Fellow of Trinity College, in the University of Cambridge 178 



No. 471. 



On the " Blaze-currents " of the Incubated Hen's Egg. By Augustus 

 I). Waller, M.D., F.R.S 184 



On the "Blaze-currents" of the Crystalline Lens. Bv Augustus D. 

 Waller, M.D., F.R.S., assisted by A. M. Waller 194 



A Contribution to the Question of Blaze Currents. By Dr. Arnold 

 Durig, of Vienna. Communicated by Augustus D. Waller, M.D., 

 F.R.S 212 



The Specific Heats of Metals and the Relation of Specific Heat to 

 Atomic Weight. Part II. By W. A. Tilden, D.Sc, F.R.S., Pro- 

 fessor of Chemistry in the Royal College of Science, London 220 



Preliminary Note on the Relationships between Sun-spots and Ter- 

 restrial Magnetism. By C. Chree, Sc.D., LL.D., F.R.S 221 



Characteristics of Electric Earth-current Disturbances, and their 

 Origin. By J. E. Taylor. Communicated by Sir Oliver Lodge, 

 F.R.S 225 



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