vi Contents. 



February 10, 1896. page 



On an Osmometer. By Dr Lazarus Barlow 72 



On the communication between peritoneal cavity and renal veins 



through the liephrostomial tubules in the frog. By E. J. Bles 

 On the effect of water currents on the assimilation of aquatic plant 



By F. Darwin and Miss D. F. M. Pertz 



On a collection of plants from New Britain (Neu Pommern). By I. H 



Burkill 



78 

 76 



90 



February 24, 1896. 



Experiments on Liquid Air. By Prof. Dewar 97 



On the Generalization of certain Properties of the Tetrahedron. By 



J. Brill 98 



On the absolute Minimum of Optical Deviation by a Prism. By J. 



Larmor 108 



March 9, 1896. 



Notes on the Geological History of Monocotyledons. By A. C. Seward 1 10 

 A description of the Crania found at Girton in 1881. By R. J. Horton- 



Smith Ill 



On the Recurrence of Ice- Ages. By Prof. T. McK. Hughes . . .114 

 On some Chipped Flints from the Plateau Gravel of Salisbury and 



elsewhere. By Prof. T. McK. Hughes 120 



On the Leakage of Electricity through Dielectrics traversed by Rontgen 



Rays. By Prof. J. J. Thomson and J. A. M°Clelland . . .126 



April 27, 1896. 



On photographing the whole length of a Spectrum at once. By Prof. 



Liveing 141 



On dioxymaleic acid and its derivatives. By H. J. H. Fenton . .142 



On the atomic weight of Oxygen. By A. Scott 143 



On the combining volumes of Carbon Monoxide and Oxygen. By 



A. Scott 144 



The constituents of Indian hemp resin. By T. H. Easterfield and T. B. 



Wood 144 



Note on the pharmacological action of cannabis resin. By C. R. 



Marshall 149 



May 11, 1896. 



Note on the formation of the germinal layers in Amphioxus. By 



E. W. Mac Bride 150 



Note, on the continuity of Mesenchyme cells in Echinid larva 3 . By 



E. W. Mac Bride 153 



Crania from Teneriffe. By F. C. Shrubsall 154 



