IV 
On the Determination of the Specific Heat of Saline Solutions. By 
Thomas Gray, B.Sc., Demonstrator in Physics, and Instructor in 
Telegraphy, Imperial College of Engineering, Tokio, Japan. Com- 
municated by Professor Tait, . . . . 
On a “Navigational” Sounding Machine. By J. Y. Buchanan, 
On the Compressibility , of Glass. By J. Y. Buchanan, 
Suggestions on the Art of Signalling. By Alexander Macfarlane, 
M.A., D.Sc., . . .' . 
Note on the Wire Microphone. By R.' M. Ferguson, Ph.D., 
Monday , 5 th July 1880. 
On the Peroxides of Zinc, Cadmium, Magnesium, and Aluminium. 
By J. Gibson, Ph.D., and R. M. Morison, D.Sc., . . . 
On the Processes in Subepiphysal Bone Growth and some points in 
Bone Resorption. By De Burgh Birch, M.B., Demonstrator of 
Physiology in the University of Edinburgh, . . • . 
On the Wire Telephone and its Application to the Study of the Pro- 
perties of strongly Magnetic Metals. By Professor Clirystal, j 
Notice of the Completion of the new Rock Thermometers at the 
Royal Observatory, Edinburgh, and what they are for. By < Pro- 
fessor Piazzi Smyth, 
Monday , 19th July 1880. 
Report on Fossil Fishes collected by the Geological Survey of Scot- 
land in Roxburghshire and Dumfriesshire. Part I. — Ganoidei. 
By Dr R. H. Traquair, ,. . 
On Some New Crustacea from the Cementstone Group of the Cal- 
ciferous Sandstone Series of Eskdale and Liddesdale. By B. N. 
Peach, F.G.S., of the Geological Survey of Scotland. Communi- 
cated by Professor Geikie, . 
Gaseous Spectra in Vacuum Tubes. Bv Professor Piazzi Smyth, 
On the Diffusion of an Impalpable Powder into a Solid Body. By 
R. Sydney Marsden, D.Sc., . . . 
On the Variation with Temperature of the Electric Resistance of 
certain Alloys. By Professor J. G. MacGregor and C. G. Knott, 
D.Sc., 
Preliminary Report on the Tunicata of the “ Challenger” Expedi- 
tion. Part II. By W. A. Herdman, D.Sc., . 
Description of New Astronomical Tables for the Computation of 
Anomalies. By Edward Sang, . . . . -V 
The Discharge of Electricity through Olive Oil. By A. Macfarlane, 
D.Sc., and P. M. Playfair, M. A., . . . 
Note on the Colouring of Maps. By Frederick Guthrie, 
Remarks on the previous Communication. By Professor Tai 
Note on the Wire Telephone as a Transmitter. By James ! : ! \ 
M.A., . ‘ . • • • 
Further Note on Graphitoid Boron and the Production of N 
Boron. By R. Sydney Marsden, D.Sc., 
Donations to the Library, . 
Index, . . • • • • 
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689 
694 
69*7 
698 
700 
706 
706 
'707 
710 
710 
711 
711 
712 
714 
714 
726 
727 ’ 
727. 
735 
769 
