776 
Index. 
Serpentinous Change, by Professor 
Heddle, 595. 
Silver Wires, Electrical Conductivity 
of, by J. G. M'Gregor, M A., 79. 
Simpson (R. J. S.) on the Discharge 
of Electricity through Turpentine, 
579. 
Sinclair (Archdeacon John), Obituary 
Notice of, 24. 
Sines. — On the Construction of a 
Canon of Sines for Decimal Division 
of Quadrant, by Edward Sang, 343. 
Canon of, for each 2000th 
Part of the Quadrant to 33 Places, 
by Edward Sang, 536. 
Smith (C. Michie), on the Zodiacal 
Light, 110. 
on the Flame Produced by 
Putting Common Salt into a Fire, 
133. 
on the Electric Conductivity 
of Nickel, 120. 
on the Thermo-Electric Pro- 
perties of Cobalt, &c., 170, 421. 
Smyth (Professor Piazzi) contributes 
Obituary Notice of Urbain Jean 
Joseph Le Verrier, 489. 
on Colour in Practical Astro- 
nomy, 721. 
Sounder to Call Attention from one 
Telephone to another, by R. H. 
Bow, C.E., 707. 
Sounds, Wave-Forms of Articulate, by 
Professor Fleeming Jenkin, 582, 
714, 723. 
Sounds of very great Intensity, by 
Professor Tait, 737. 
Specific Gravity. See Gravity. 
Spionidse, On the Structure of the 
Body-wall in the, by Dr W. C. 
MTntosh, 123. 
Stark (Dr), on the Defoliation of the 
Coniferae, 85. 
Steam Engine, The Efficiency of, 
Determined by the Graphic Me- 
thod, by Professor Fleeming Jen- 
kin, 563. 
Stevenson (David), V.P., On Works 
for the Improvement of the Danube, 
Designed by Sir Charles A. Hartley, 
142. 
on Earthquake Shocks in 
Argyllshire, 403. 
Contributes Obituary Notices 
of Mr Thomas Login, 205 ; and 
Professor Lewis D. B. Gordon, 212. 
Stewart (Professor Balfour) elected an 
Honorary Fellow, 536, 
Stirling (A. B.) on the Fungus 
Disease Atfecting Salmon, 726. 
Stokes (Professor) on Certain For- 
mulse in the Calculus of Operations, 
101 . 
Storms. See Barometric Depressions. 
Struve (Otto), Elected an Honorary 
Fellow, 536. 
Sunbow, Notes on a White, by Sir 
Robert Christison, Bart., Professor 
Tait, Mr J. Christison, Mr Buchan, 
and Dr Ferguson, 542-48. 
Sunspots. — On the Decennial Period in 
Sunspot Frequencv, by J. A. Broun, 
155. 
Surface of a Body in Terms of a 
Volume-Integral, by Prof. Tait, 415. 
Suspension, Solution and Chemical 
Combinations, by William Dickson, 
537. 
Tabulation of Fractions. See Frac- 
tions. 
Talbot (W. H. Fox), Obituary Notice 
of, by Professor Kelland, 512. 
His Proof of Theorem, as to 
Properties of Two Sets of Three 
Concentric Circles, which have the 
Same Common Difference of Radii, 
and which Intersect one another, 
533. 
Tait (Professor) on the Linear Dif- 
ferential Equation of the Second 
Order, 93. 
Mechanism for Integrating 
the General Linear Differential 
Equation of the Second Order, 118. 
on Orthogonal Isothermal Sur- 
faces, 170. 
on Vector Conditions of In- 
tegrability, 527. 
Note on a Geometrical Theo- 
rem, as to Properties of Two Sets 
of Three Concentric Circles, which 
have the same Common Difference 
of Radii, and which Intersect one 
another, 533. 
Note on the Surface of a Body 
in Terms of a Volume-Integral, 
541. 
on some Definite Integrals, 
594. 
on Applications of Theorem 
that Two Closed Plane Curves In- 
tersect an Even Number of Times, 
237. 
Mr Muir on Professor Tait’s 
Problem of Arrangement, 382. 
