Index. 
553 
Smyth (C. Piazzi), on the Fall of a 
Part of the Cliff below Nelson’s 
Monument, 130. 
Mean Scottish Meteorology 
for the last Thirty-two Years, dis- 
cussed for Annual Cycles, as well 
as Supra-annual Solar Influences, 
on the basis of the Observations of 
the Scottish Meteorological Society, 
348. 
Solca solea (Sole), 220. 
variegata (Thick-Back), 220. 
Spheres. — Average Number of Col- 
lisions per Particle per Second in a 
Group of Equal Spheres, by Prof. 
Tait, Sec. R.S.E. 225. 
Staffordshire Coal-Fields, Fossil Flora 
of, by R. Kidston, 135. 
Stecher (Ernst), Ph.D., Contact Phe- 
nomena of some Scottish Olivine- 
Diabases, 160. 
Stevenson (Charles A.), F.R.S.E., 
Notice of the Recent Earthquake in 
Scotland, with Observations on 
those since 1882, 259. 
Stewart (George N. ), The Electrolytic 
Decomposition of Proteid Sub- 
stances, 399. 
Is the Law of Talbot true for 
very rapidly Intermittent Light? 
441. 
Sticliaeus lampeti'aeformis, 211. 
Stockman (Ralph), and R. B. Dott, 
F.R.S.E., The Formula of Mor- 
phine, 131. 
Sulphates of the Copper-Magnesium 
Group. See Ray (Prafulla Chandra). 
Tait (Professor P. G.), Sec. R.S. E., 
on the Compressibility of Water 
and of Different Solutions of Com- 
mon Salt, 84. 
on the Thomson Effect in Iron, 
115. 
on the Thermoelectric Pro- 
perties of Iron, 127. 
on Mr Omond’s Observations 
of Fog-Bows, 129. 
Reply to Professor Boltzmann, 
140. 
Preliminary Note on the Dura- 
tion of Impact, 159. 
on the Mean Free Path, and 
the Average Number of Collisions 
per particle per second in a Group 
of Equal Spheres, 225. 
Note on the Compressibility of 
Glass at different Temperatures, 226. 
on the Effect of Differential 
Mass-Motion on the Permeability 
of a Gas, 249. 
VOL. XV. 28/2/89 
Tait (Professor P. G.), Quaternion 
Note, 302, 379. 
on Laplace’s Theory of the 
Internal Pressure in Liquids, 426. 
Talbot’s Law. See Stewart (George 
N.). 
Tetrakaidekahedron (the Minimal), by 
Sir William Thomson, Pres. R.S.E., 
33. 
Thermoelectric Properties of Tin at its 
Melting Point, by Albert Campbell, 
B.A., 125. 
Thermoelectric Properties of Iron, by 
Prof. P. G. Tait, Sec. R.S.E., 127. 
Thermometer. — A Practical Constant- 
Volume Air Thermometer, by J. T. 
Bottomley, 85. 
Electrical Method of Reversing 
Deep-Sea Thermometers, by Prof. 
Chrystal, F. R.S.E., 298. 
Thomson Effect in Iron, 115. 
Thomson (Sir William), Pres. R.S.E., 
on Cauchy’s and Green’s Doctrine 
of Extraneous Force to explain dy- 
namically Fresnel’s Kinematics of 
Double Refraction, 21. 
on the Minimal Tetrakaideka- 
hedron, 33. 
Note on the Determination of 
Diffusivity in Absolute Measure from 
Mr Coleman’s Experiments, 256. 
Thysanoessa borealis, 414. 
Tin. — The Change in the Thermo- 
electric Properties of Tin at its 
Melting Point, by Albert Campbell, 
B.A., 125. 
Transition Resistance and Polarisa- 
tion, by W. Peddie, D.Sc., 
F.R.S.E., 118, 411. 
Traquair (Dr Ramsay), F.R.SS. L. 
and E., on Fossil Fishes from the 
Pumpherston Oil Shale, 410. 
Obituary Notice of Robert Gray, 
Vice-President, 435. 
Trigla gurnarclus (Gurnard), 209. 
Triglops murrayi, 209. 
Turner (Sir William), Sec. R.S.E., The 
Pineal Body {Epiphysis cerebri) in 
the Brains of the Walrus and Seals, 
65. 
Twin Development Arrested, by J. 
Macdonald Brown, F.R.S.E., 465. 
Ustilago cucumis, Life-Historv of, by 
Dr A. B. Griffiths, F.R.S.E., 404. 
Uterus during Pregnancy and the 
Puerperium, by T. A. Helme, M. B. , 
435. 
Variables of the ^ith Degree, by Lord 
McLaren, 467. 
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