XI 



Page 



A Geometrical Interpretation of the first two Periods of Chemical 

 Elements following Hydrogen, showing the Relations of the fourteen 

 Elements to each other and to Hydrogen by means of a Eight Line and 

 Cubic Curve with one real Asymptote. By Rev. Samuel Haughton, 

 M.D., F.R.S 482 



On the Force with which the two Layers of the healthy Pleura cohere. 

 By Samuel West, M.D., F.R.C.P 482 



Total Eclipse of the Sun observed at the Caroline Islands on May 6, 

 1883. By W. de W. Abney, Captain R.E., F.R.S 482 



Note on Mr. Davison's Paper on the Straining of the Earth's Crust in 

 Cooling. By G. H. Darwin, M.A., F.R.S., Plumian Professor of 

 Astronomy and Experimental Philosophv in the University of 

 Cambridge 483 



A further minute Analysis, by Electric Stimulation, of the so-called 

 Motor Region of the Cortex Cerebri in the Monkey (JIacacus sinicus). 

 Bv Charles E. Beevor, M.D., and Professor Victor Horsley, F.R.S., 

 B*S., F.R.C.S „. 483 



On the present Position of the Question of the Sources of the Nitrogen 

 of Vegetation, with some new Results, and preliminary Notice of new 

 Lines of Investigation. By Sir J. B. Lawes, Bart., F.R.S., and J. H. 

 Gilbert, M.A., LL.D., F.R.S., Sibthorpian Professor of Rural Economy 

 in the University of Oxford ; 483 



On Diameters of Plane Cubics. By John J. Walker, M.A., F.R.S 483 



List of Presents i 483 



Note on some Experiments on the Viscosity of Ice. By J. F. Main, 

 M.A., D.Sc 491 



No. 257. 



The Air of Sewers. By Professor Thomas Carnelley, D.Sc, and J. S. 



Haldane, M.A., M.B., University College, Dundee 501 



Index 523 



Errata 532 



Obituary Notices : — 



John Theophilus Boileau i 



Sir Walter Elliot, K.C.S.I , LL.D viii 



Sir Joseph Whitworth ix 



Dr. Allen Thomson xi 



