CONTENTS. XXlll 



PAGE 



XL. On the Principal Deities of the Rigveda. By J. Mum, D.C.L., 



LL.D., ....... 547 



XLT. The Law of the Volumes of Aeriforms extended to Dense Bodies. 



By Rev. J. G. Macvicar, M.A., D.D., Moffat, . . .581 



XLII. Biographical Sketch of Adam Ferguson, LL.D.., F.R.8.E.., Pro- 

 fessor of Moral Philosophy in the University of Edinburgh. By 



John Small, M.A., Librarian to the University, . . 599 



XLin. On the Reputed Metrological System of the Great Pyramid. By Pro- 

 fessor C. PiAzzi Smyth. (With five Plates, XXIII.-XXVII.), 667 



XLIV. On the Theory of Isomeric Compounds. By Dr A. Crum Brown, 707 



XLV. On the Theory of Commensurables. By Edward Sang, Esq. . 721 



XL VI. On the Structure and Action of the Auriculo- Ventricular Valves. 

 By James B. Pettigrew, M.D. Communicated by W. Turner, 

 M.B., Demonstrator of Anatomy in the University of Edin- 

 burgh, ....... 761 



Proceedings of Statutory General Meetings., &C.., .... 807 



List of Members Elected., ....... 814 



List of the present Ordinary Members., in the order of their Election., . .816 



List of N on- Resident and Foreign Members., elected under the Old Laws., . 823 



„ Honorary Fellows., ....... 823 



„ Fellotvs Deceased., Resigned., and Cancelled., from 1861 to 1864, . 825 

 Public Institutions^ dec, entitled to receive the Transactions and Proceedings 



of the Society, . ...... 826 



List of Donations continued from Vol. XXII, p. 750, . . . 828 



Index, ......... 857 



