No. 147.— November 20, 1873. 



Page 



Note on the Electrical Phenomena which accompany irritation of the leaf of 

 Dioncea muscipula. By J. Burdon Sanderson, M.D., F.R.S., Professor of 

 Practical Physiology in University College, London 495 



On the Algebraical Analogues of Logical Relations. By Alexander J. 

 Ellis, B.A., F.R.S., F.S.A., F.C.P.S., F.O.P 497 



November 27, 1873. 



On the Optical Properties of a new Chromic Oxalate. By Walter Noel 

 Hartley, F.C.S., Demonstrator of Chemistry, King's College, London . . 499 



On the Quantitative Analysis of certain Alloys by means of the Spectro- 

 scope. By J. Norman Lockyer, F.R.S., and William Chandler Roberts, 

 Chemist of the Mint - 507 



Researches in Spectrum- Analysis in connexion with the Spectrum of the 

 Sun. — Part III. By J. Norman Lockyer 508 



List of Presents 514 



Index 519 



Obituary Notices of Fellows deceased : — 



William John Macquorn Rankine i 



John Bishop v 



Baldwin Francis Duppa vi 



ILLUSTRATIONS. 



Plate I. illustrating E. Ray Lankester's Contribution to the Knowledge of 

 Haemoglobin. 



Plates II. to VI. illustrating Dr. Royston-Pigott's Researches in Circular 

 Solar Spectra. 



