608 
Index. 
Rosse (Earl of), Obituary Notice of, 
199. 
Rotation of a Rigid Body round a 
Fixed Point, 420, 592. 
Royal Society of Edinburgh, History 
of, 393. 
Russell (Robert) on the Nature and 
Character of European Winter 
Storms, and the best Means of 
giving Warning of their Approach, 
140. 
on the Rectangular Current 
Theory of Storms, illustrated by 
two Storms which passed over the 
United States from 13th to 19th 
March 1869, 525. 
Rutherford (Dr Wm.), Influence of 
the Vagus upon the Vascular Sys- 
tem, 538. 
Sandstone, Flexible, a variety of, 
485. 
Sang (Edward) on some Phenomena 
of Indistinct Vision, 58. 
on Compensation Pendulums 
of two Pieces, 67. 
Method of ascertaining the 
Specific Gravity of Water which 
holds a minute quantity of Foreign 
Matter in solution ; or, on the 
Specific Gravity of Impure Water, 
78. 
on the Vibration of a Uni- 
form Straight Spring, 150. 
Scientific Education, 173, 185. 
Scoresby- Jackson (Robert E.), Obitu- 
ary Notice of, 197. 
Scott (John) on the Burning Mirrors 
of Archimedes, and on the Concen- 
tration of Light produced by Re- 
flection, 232. 
Sense Perception, as a Perception of 
Power, 539. 
Simpson (Sir J. Y.) on Pyramidal 
Structures in Egypt and elsewhere; 
and the Objects of their Erection, 
243. 
Smith (James), Obituary Notice of, 
200 . 
Smith (W. R.) on Hegel and the 
Metaphysics of the Fluxional Cal- 
culus, 555. 
Mr Mill’s Theory of Geo- 
metrical Reasoning Mathematically 
tested, 477. 
Smyth (Professor C. Piazzi) on the 
Antiquity of Intellectual Man, 
from a Practical Astronomical 
Point of View, 226. 
Smyth (Professor C. Piazzi), Re- 
marks on two Pyramid Papers in 
the Proceedings of the Royal So- 
ciety of Edinburgh, 316. 
Practical Note on Intensified 
Gravity in Centrifugal Governors, 
477. 
Soap-Bubble, Colours of the, 64. 
Sodium, its Action on Pyridine, 
379. 
Sophists of the Fifth Century, b.c., 
119. 
South (Sir James), Obituary Notice 
of, 202. 
Specific Gravity of Impure Water, 
78. 
Spectrum, on the Radiant, 147, 167. 
on the best Arrangement for 
producing a Free Spectrum on a 
Screen, 238. 
Vapour Lines in the, 145. 
Spores of Cryptogamic Plants, 294. 
Spring, Uniform Straight, Vibration 
of, 150. 
Stark (James, M.D.) on the Influ- 
ence of Marriage on the Death- 
Rates of Men and Women in 
Scotland, 49. 
Stevenson (Alan), Obituary Notice 
of, 23. 
Stevenson (David), Notice of Works 
designed by Sir Charles Hartley 
for the Improvement of the Danube, 
313. 
Stevenson (James), Obituary Notice 
of, 34. 
Stewart (John), Obituary Notice of, 
203. 
Storms, European Winter ; their 
Nature and Character, &c., 140. 
Storms, Rectangular Currents, Theory 
of, illustrated, 525. 
Strains on Framework, Practical Ap- 
plication of Reciprocal Figures to 
the Calculation of, 516. 
Sun’s Distance, Determinations, 307. 
Sun’s Distance, Present State of the 
Question, 517. 
Symbolical Cubic which expresses 
the Properties of a Self-con jugate 
Linear and Vector Function, 92. 
Tait (Professor), Note on Determin 
ants of the Third Order, 59. 
Note on the Reality of the 
Parts of the Symbolical Cubic 
which expresses the Properties of 
a Self-conjugate Linear and Vec- 
tor Function, 92. 
