Contents . 
IX 
PAGE 
On the Wire Telephone and its Application to the Study of the Pro- 
perties of strongly Magnetic Metals. By Professor Chrystal, . 70V 
Notice of the Completion of the new Rock Thermometers at the 
Royal Observatory, Edinburgh, and what they are for. By Pro- 
fessor Piazzi Smyth, . . . . . .710 
Report on Fossil Fishes collected by the Geological Survey of Scot- 
land in Roxburghshire and Dumfriesshire. Part I. — Ganoidei. 
By Dr R. H. Traquair, . . . . . .710 
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, . . . . . .711 
Gaseous Spectra in Vacuum Tubes. By Professor Piazzi Smyth, . 711 
On the Diffusion of an Impalpable Powder into a Solid Body. By 
R. Sydney Marsden, D.Sc., . . . . .712 
On the Variation with Temperature of the Electric Resistance of 
certain Alloys. By Professor J. G. MacGregor and C. G. Knott, 
D.Sc., ........ 714 
Preliminary Report on the Tunicata of the “ Challenger” Expedi- 
tion. Part II. By W. A. Herdman, D.Sc., . . .714 
Description of New Astronomical Tables for the Computation of 
Anomalies. By Edward Sang, . . . . .726 
The Discharge of Electricity through Olive Oil. By A. Macfarlane, 
D.Sc., and P. M. Playfair, M.A., . . . . .727 
Note on the Colouring of Maps. By Frederick Guthrie, . .727 
Remarks on the previous Communication. By Professor Tait, . 729 
Note on the Wire Telephone as a Transmitter. By James Blyth, 
M.A., . . . . . . . .730 
Further Note on Graphitoid Boron and the Production of Nitride of 
Boron. By R. Sydney Marsden, D.Sc., . . .733 
Donations to the Library, ...... 735 
Index, ........ 769 
