CONTENTS. 



PART I. (1869-70.) 



TAGE 



I. — On Reciprocal Figures, Frames, and Diagrams of Forces. 

 By J. Clerk Maxwell, F.R.SS. L. & E. (Plates I., 

 II., and III.), ...... 1 



II. — On Scientific Method in the Interpretation of Popular Myths, 

 with special reference to Greek Mythology. By Professor 

 Blackie, ...... 41 



III. On the Extension of Brouncker's Method to the Comparison of 



Several Magnitudes. By Edward Sang, Esq., . . 59 



IV. — On Green's and other Allied Theorems. By Professor Tait, . 69 



V. — On the Heat Developed in the Combination of Acids and Bases. 

 Second Memoir. By Thomas Andrews, M.D., F.R.S., 

 Hon. F.R.S.E., Vice-President of Queen's College, 

 Belfast, . . . . . . .85 



VI. — The Genetic Succession of Zooids in the Hydroida. By 



Professor Allman, . . . . .97 



VII. — Influence of the Vagus upon the Vascular System. By 

 William Rutherford, M.D., F.R.S.E., Professor of 

 Physiology, King's College, London, . . .107 



VIII. — On the Old River Terraces of the Earn and Teith, viewed in 

 connection with certain Proofs of the Antiquity of Man. 

 By the Rev. Thomas Brown, F.R.S.E. (Plate IV.), . 149 



VOL. XXVI. PART IV. f 



