Contents. 
IX 
PAGE 
On the Wire Telephone and its Application to the Study of the Pro- 
perties of strongly Magnetic Metals. By Professor Chrystal, . 707 
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 
ERRATA. 
Page 700, line 8, for “Microphone,” read “Telephone. 
„ 702, line 14, for “onset,” read “set.” 
