Contents. vii 



PAGE 



On the Recovery of foliage Leaves from surgical Injuries. By F. F. 



Blackman and Miss G. L. C. Matthaei 222 



Liquid Motion from a Single Source inside a Hollow Unlimited Boun- 

 dary. By H. J. Sharpe 223 



Liveingite, a new mineral from the Binnenthal. By R. H. Solly, with 



analysis by H. Jackson 239 



Proceedings at the Meetings held during the Session 1900 — 1901 . . 241 

 On the Hall Effect in Oases at Low Pressures. By H. A. Wilson . . 249 

 On some Phenomena connected with the Combination of Hydrogen and 



Chlorine under the influence of Light. By P. V. Bevan . . . 264 

 Notes on the Development of Sagitta. By L. Doncaster . . . 267 



On the Unit of Classification for Systematic Biology. By H. M. Bernard 268 

 Notes on the Binney Collection of Coal-Measure Plants. Part ill. The 



Type- Specimens of Lyginodendron Oldhamium (Binney). By E. A. 



Newell Arber 281 



On the Negative Radiation from hot Platinum. By 0. W. Richardson 286 

 On the Action of Incandescent Metals in producing Electric Conductivity 



in Gases. By J. A. McClelland 296 



On the Question of "Predisposition" and " Lnmunity" in Plants. By 



Prof. H. Marshall Ward 307 



On the Genito-urinary Organs of Dipnoan Fishes. By J. Graham Kerr 329 

 Further Observations upon the Biological Test for Blood. By Dr G. H. 



F. Nuttall 334 



Note on a Method for determining the Concentration of Hydrogen Ions in 



Solution. By H. 0. Jones and 0. W. Richardson . . . 337 



On the oxidation of Ghccosone to Trioxybutyric Acid. By R. S. Morrell 340 

 On the formation of Di-nitro-phenoxazines. By J. C. Crocker . . 342 

 On the interaction of Thiocyanates, Picric Chloride, and Alcohols. By 



J. C. Crocker 347 



Note on the Reduction of a Ternary Quantic to a Symmetrical Deter- 

 minant. By Dr A. C. Dixon 350 



On the Zeros of a Polynomial. By J. H. Grace 352 



On Oxidation in Presence of Iron. By H. J. H. Fenton . . . 358 



On a method of increasing the sensitiveness of Michelson's Interferometer. 



By H. C. Pocklington 375 



On the Influence on Light reflected from and transmitted through a Metal 



of a Current in the Metal. By P. V. Bevan 380 



On the Hall Effect in Gases at Low Pressures. By H. A. Wilson . .391 

 On the Coefficient of Mutual Induction for a circle and a circuit -with two 



parallel sides of infinite length. By G. F. C. Searle . . . 398 

 Notes on Semper 's Larvae (With Plate IV.). By K. Ramdnni Menon . 407 



On a Definite Integral. By T. J. I' A. Bromwich 419 



On the Unit of Classification for Systematic Biology. By J. Stanley 



Gardiner 423 



