vii 



February 28, 1884. 



Page 



On the Structure and Functional Significance of the Human Corpus 

 callosum. By Professor D. J. Hamilton 349 



On the Surface Forces in Fluids. By A. M. Worthington 351 



List of Presents 353 



On a Method of Tracing Periodicities in a Series of Observations when 

 the Periods are unknown. By Vinayek Narayeu Nene, First Assis- 

 tant, Government Observatory, Colaba, Bombay (Plate 4) 361 



No. 231.— March 6, 1884. 



List of Candidates 404 



Magnetic Polarity and Neutrality. By Professor D. E. Hughes, F.E.S... 405 



On the Origin of the Fibrin Ferment. By L. C. Wooldridge, M.B., 

 D.Sc, George Henry Lewes Student 417 



March 13, 1884. 



Eesearches in Spectrum Photography in Eelation to new Methods of 

 Quantitative Chemical Analysis. Part II. By W. N. Hartley, 

 F.E.S.E., &c, Professor of Chemistry, Eoyal College of Science, 

 Dublin 421 



On the Mean Diurnal Variation of Magnetic Declination, from Hourly 

 Observations at Fort Eae. By Captain H. P. Dawson, E.A 422 



Notes on the Microscopic Structure of some Eocks from the Andes of 

 Ecuador, collected by Edward Whymper. No. II. Antisana. By 

 Professor T. G. Bonney, D.Sc, F.E.S 426 



The Variation of Stability with Draught of Water in Ships. By F. 

 Elgar, Professor of Naval Architecture in the University of Glasgow.... 434 



March 20, 1884. 



Experimental Eesearches in Cerebral Physiology. By Victor Horsley, 

 M.B., B.S., F.E.C.S., and Edward Albert Schafer, F.E.S 437 



Preliminary Note on the Apex of the Leaf in Osmunda and Todea. 

 (From the Jodrell Laboratory, Eoyal Gardens, Kew.) By F. O. 

 Bower, F.L.S 442 



On the most Widened Lines in Sun-Spot Spectra. First and Second 

 Series, from November 12, 1879, to October 15, 1881. By J. N. 

 Lockyer, F.E.S 443 



March 27, 1884. 



Notes on the Varieties and Morphology of the Human Lachrymal Bone 

 and its accessory Ossicles. By A. Macalister, F.E.S., Professor of 

 Anatomy in the University of Cambridge 447 



