x CONTENTS, 
PART III.  (1877-1878.) 
XXIX.—On the Application of Graphic Methods to the Determination 
of the Efficiency of Machinery. Part Second.—The Hori- 
zontal Steam Engine. By Professor FLEEMING JENKIN, 
F.R.SS. L. & E. (Plates XXVI.-XXXIIL), 
XXX.—Thermal and Electric Conductivity. By Professor Tair, 
XXXI.—On Thermodynamic Motivity. By Sir W. THomsoy, F.R.S., . 
XXXII—On the Harmone Analysis of certain Vowel Sounds. By 
Professor FLEEMING JENKIN, F.R.SS. L. & E., and J. A. 
Ewine, B.Sc., F.R.S.E. (Plates XXXIV. to XL.), 
XXXIII.—Colour, in Practical Astronomy, Spectroscopically Examined. 
By Piazza Smytu, Astronomer Royal for Scotland. (Plates 
XLI-XLIIL), 
APPENDIX— 
The Council of the Society, 
Alphabetical Inst of the Ordinary Fellows, 
List of Honorary Fellows, 
List of Ordinary Fellows Elected from 1876 to 1879, 
List of Fellows Deceased, Resigned, and Cancelled, from November 
1876 to June 1879, : : F ’ 
Laws of the Society, 
The Keith, Brisbane, and Neill Prizes, « 
Awards of the Keith, Makdougall-Brisbane, and Neill Prizes, 
Proceedings of the Statutory Meetings, 
List of Public Institutions that receive Copies of the Transactions, . 
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745 
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