CONTENTS. 



PART I. (1868-69.) 



PACK 



I. — On Polyzomal Curves, otherwise the Curves ,J U + JV+ &c. = 0. 



By Professor Cayley. Communicated by Professor Tait, 1 



IT. — On the Motion, Equilibrium, and Forms of Liquid Films. By the 

 late Sir David Brewster, K.H., D.C.L., &c. (Plates I. 

 and II.) Communicated by Francis Deas, Esq., LL.B., . Ill 



III. — On the Temperature of the Common Fowl (Gallus domesticus). 

 By the late Dr John Davy, F.R.SS. Lond. & Ed in. 

 Communicated by Professor Allman, . . .119 



IV. — On the Burning Mirrors of Archimedes, with some Propositions 

 relating to the Concentration of Light produced by Reflectors 

 of different forms. By John Scott, Esq., Tain. (Plate III.) 

 Communicated by Professor Kelland, . . . 123 



V. — On the Connection between Chemical Constitution and Physiological 

 Action. Part I. — On the Physiological Action of the Salts 

 of the Ammonium Bases, derived from Strychnia, Brucia, 

 Thebaia, Codeia, Morphia, and Nicotia. By Dr A. Crum 

 Brown and Dr Thomas R. Fraser, . . .151 



VI. — On the Products of the Destructive Distillation of Animal Sub- 

 stances. Part V. By Thomas Anderson, M.D., Professor 

 of Chemistry in the University of Glasgow, . . 205 



VII.— On Vortex Motion. By Professor Sir W. Thomson. (Plate III*), 217 



