- XXI — 



On the Effect of Heat on the Chloride, Bromide, and lodide of 



Silver. By G. F. Rodwell 

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



G. F. Rodwell 

 On the Absorption-Spectra of Bromine and lodine Monochloride. 



By H. E. Roscoe. 

 On the Origin of Windings of Rivers in Alluvial Plains, with 



Remarks on the Flow of Water round Bends in Pipes. By 



Professor James Thomson. 

 On the Modification of the Excitability of Motor Nerves produced 



by Injury. By G. J. Romanes. 

 On some Thallophytes parasitic within recent Madreporaria. By P. 



M. Duncan. 

 On the Calculation of the Trajectories of Shot. By W. D. Niven. 

 Condensation of Vapour of Mercury on Selenium in the Sprengel 



Vacunm. By R. J. Moss. 

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

 Supplementary Note on Simultaneons Barometric Variations. By 



J. A. Broun. 

 On Clairautian Functions and Equations. By Capt. J.^Za9^ Cunningham. 

 Absorption-Spectra of lodine. By Sir John Conroy. 

 On the Polarization of Light by Crystals of lodine. By Sir John 



Conroy. 

 Picrorocellin. By John Stenhouse, and Charles Edward Groves. 

 On the Organization of the Fossil Plants of the Coal-measures. — 



Part Vili. Ferns (continued) and Gymnospermous Stems and 



Seeds. By Prof. W. C. Williamsom. 

 On Stratified Discharges. — II. Observations with a Revolving 



Mirror. By William Spottiswoode. 

 The Oalculus of Chemical Operations. — Part II. On the Analysis 



of Chemical Events. By Sir B. C. Brodie. 

 Report to the Hydrographer of the Admiralty on the Voyage of 



the "Challenger" from the Falkland Islands to Monte Video, 



and a Position in lai 32» 24' S., long. 13" 5' W. By Pro- 

 fessor Wyville Thomson. 

 Preliminary Note on the Structure of the Stylasteridse, a group of 



Stony Corals which, like the Milleporidse, are Hydroids, and 



not Anthozoans. By H. N. Moseley. 

 On the Comparative Anatomy of the Auditory Ossicles of the 



Mammalia. Bv Alban H. G. Doran. 



