CONTENTS. xm 



On certain circumstances affecting the Colour of Blood during 

 Coagulation. By Dr P. K. Newblgging. Communicated by Pro- 

 fessor Forbes, ....... 263 



On Two Storms which passed over the British Islands in the end 

 of November 1838. By David Milne, Esq., . . .264 



Solution of a Functional Equation, with its application to the Paral- 

 lelogram of Forces, and to Curves of Equilibration. By Dr 

 Wallace, Emeritus Professor of Mathematics, . . 273 



On General Differentiation. Part I. By Professor Kelland, 27i 



Experiments on the Development and Growth of the Salmon, from 

 the exclusion of the Ovum to the Age of two years. By Mr 

 Shaw, Drumlanrig. Communicated by James Wilson, Esq., 275 



On the use of the word " Temperature" in the Analytical Theory 

 of Heat. By Professor Kelland, .... 279 



On the Effect of the Mechanical Texture of Screens on the imme- 

 diate Transmission of Radiant Heat. By Professor Forbes, 281 



On the Functions of the Roots of the Spinal Nerves, in corrobora- 

 tion of former observations, proving that the anterior roots are 

 nerves of motion, and the posterior nerves of sensation. By Sir 

 Charles Bell, K.H., . . . . . .284 



On General Differentiation. Part H. By Professor Kelland, . 285 



On the means employed to prevent Forgeries of Bank Notes, Bills 

 of Exchange, Cheques, &c. By Dr Traill, . . . 285 



Observations on the influence of various circumstances in Vegeta- 

 tion, in modifying the Physiological Actions of Plants, By Dr 

 Christison, ....... 286 



A Specimen of Clavagella Balanorum (Scacchi), presented by Sir 

 Thomas Brisbane, Bart., President of the Society, was laid on the 

 table, with remarts by Dr Traill, .... 288 



On the Cosmogony described in the Sixth Eclogue of Virgil, and on 

 its relation to the Theories of Modern Geology. By the Vener- 

 able Archdeacon Williams, ..... 291 



A brief notice relative to an Aerolite which was seen to fall near 

 Juvinas, in the Department of the Ardeche in France, on the 15th 

 June 1821. By Professor Forbes, .... 292 



On the Persian mode of making Malleable Iron direct from the Ore. 

 By James Robertson, Esq. Cpmmunicated by Robert Bald, 

 Esq., ........ 293 



On the Fatal Effects of Air drawn into the Veins during Surgical 

 Operations on the Neck and Shoulder. By Sir Charles Bell, 

 K.H., ........ 293 



On Sulphuret of Cadmium, a New Mineral, (first observed by Lord 

 Greenock). By Arthur Connell, Esq., .... 294 



On an Optical Illusion, giving the idea of an Inversion of Perspec- 

 tive, in viewing objects through a Telescope. By Professor 

 Forbes, ........ 296 



List of African Shells, collected by J. 0. M' William, Esq., Surgeon, 

 R.X., and presented by him to the Royal Society, through Dr 

 Traill, . " . . . . . . .296 



