CONTENTS. 

 VOL. XXXVI. 



Tage 



No, 22S;— November 15, 1883. 



Malwnia Aquifolia as a Nurse of the Wheat Mildew (Puccinia arami/iis). 

 By Charles B. Plowright 1 



Description of Teeth of a Large Extinct (Marsupial ?) Genus, Scepar- 

 nodon Bamsay. By Professor Owen, C.B., F.R.S ~ 3 



Evidence of a Large Extinct Monotreme (Echidna Ramsay i, Ow.) from 

 the Wellington Breccia Cave, New South Wales. By Professor Owen, 

 C.B., F.R.S 4 



Correction to a paper " On the Determination of Verdet's Constant ? 

 published in the ''Phil. Trans.," 1877. By J. E. H. Gordon, 

 M.S.T.E. 4 



Note on the Irregularities in Magnetic Inclination on the West Coast of 

 Scotland. By T. E. Thorpe, F.R.S., and A. W. Riieker, M.A 5 



On the Circulation of Air observed in Kundt's Tubes, and on some 

 Allied Acoustical Problems. By Lord Rayleigh, D.C.L., F.R.S 10 



The Influence of Bodily Labour upon the Discharge of Nitrogen. By 

 W. North, B.A., F.C.S U 



November 22, 1883. 



On the Formation of Ripple-mark in Sand. By G H. Darwin, F.R.S 

 Plumian Professor and Fellow of Trinity College, Cambridge 18 



On the Atomic Weight of Titanium. By T. E. Thorpe, F.R.S 43 



On the Life History of the Dock iEcidium (^Eeidium rumicis, Schlecht). 

 By Charles B. Plowright 47 



Some Relations of Heat to Voltaic and Thermo-Electric Action of Metals 

 in Electrolytes. By G. Gore, LL.D., F.R.S 50 



On a " Rennet " Ferment contained in the Seeds of Withania coagidans. 

 By Sheridan Lea, M.A., Trinity College, Cambridge 55 



