V 
proceedings 
OF THE 
ROYAL SOCIETY OF EDINBURGH, 
SESSION 1879-80. 
CONTENTS. 
Monday , 24Jh November 1879. 
Election of Office-Bearers, 1879-80, . 
PAGE 
. 315 
Monday, 1st December 1879. 
Opening Address by the President, The Right Hon. Lord Moncreiff, 316 
Obituary Notices of Fellows, Session 1879-80, . . . 321 
Monday, 15 th December 1879. 
On the Expansion of Cast Iron while Solidifying. By J. B. Hannay, 
F.R.S.E., F.C.S., and Robert Anderson, . . . 359 
Researches on Contact Electricity. By C. G. Knott, Se.D. Com- 
municated by Professor Tait, • • • • . 362 
On an Instrument for detecting Coal-Gas in Mines, By Professor 
George Forbes, . . . . . . . 365 
On Comets. By Professor Tait, . . . 367 
Additional Observations on Fungus Disease of Salmon and other 
Fish. By A. B. Stirling, Assistant- Curator in the Museum of 
Anatomy in the University of Edinburgh. Communicated by Prof. 
Turner, 0 . . . . . . . 370 
Monday, 5th January 1880. 
The Trigonometrical Survey of Palestine. By Lieut. Claude Reignier 
Conder, R.E., ....... 379 
On Minding-s System of Forces. By Professor Chrystal, . . 397 
Mathematical Notes. By Professor Tait — 
a. On a Problem in Arrangements, . . . . 400 
b. On a Graphical Solution of the Equation Vp(pp — 0, . 402 
Monday, IDih January 1880. 
Part of the Material employed by Principal Forbes in Tamping the 
Bore for his Earth Thermometers at the Edinburgh Observatory 
was exhibited in its altered state, . . . . . 405 _ 
A New Method of investigating Relations between Functiph'sAf the ) 
Roots of an Equation, and its Coefficients. By J. D. H.' Dfckson, 
M.Arf, _ . . . . ' . . . 405 
Rema-rks;on Mr Crookes’ Recent Experiments. By Prqf. George Forbes, 405 
Additionid Note on Minding’s Theorem. By Profes^pr Tait, . 407 
[Turn over. 
