CONTENTS. 

 VOL. XXY. 



No. 171.-~Mai/ 4, 1876. 



Page 



Supplementary Note on tlie Theory of Ventilation. By Francis S. B. 

 Fraupois de Cliaumont; M.D., Surgeon-Major, Army Medical Department_, 

 and Conjoint Professor of Hygiene^ Army Medical School 1 



On the Effect of Heat on the Chloride, Bromide, and Iodide of Silver. By 

 G. F. Eodwell, F.E. A.S., F.C.S., Science Master in Marlborough College 4 



On the Effects of Heat on some Chloro-brom-iodides of Silver, By G-. F. 

 Eodwell, F.E.A.S,, F.C.S., Science Master in Marlborough College 4 



On the Absorption-Spectra of Bromine and Iodine Monochloride. By H. 



E. Eoscoe, F.E.S., and T. E. Thorpe 4 



On the Origin of Windings of Elvers in Alluvial Plains, with Eemarks on 

 the Flow of Water round Bends in Pipes. By Professor James Thomson, 

 LL.D., F.E.S.E 5 



On the Modification of the Excitability of Motor Nerves produced by Injury. 

 By G. J. Eomanes, M.A., F.L.S 8 



Mmj 11, 1876, 



On some Thallophytes parasitic within recent Medreporaria. By P. M. 

 Duncan, M.B,, F.E.S., President of the Geological Society 17 



On the Calculation of the Trajectories of Shot. By W. D. Niven, M.A,, 



F, E.A.S 18 



Condensation of ^''apoiu: of Mercury on Selenium in the Sprengel Vacuum. 

 By E. J. Moss, F.C.S., Chemical Laboratory, Eoyal Dublin Society .... 22 



On Simultaneous Variations of the Barometer in India. By J. A. Broun, 

 F.E.S. (Plate 1.) 24 



Supplementary Note (on Simultaneous Barometric Variations. By J. A. 

 Broun, F.E.S. Plate].) 39 



