420 Index to Transactions I — XII. 



Polarized Light, Certain effects in Crystals exposed to : May 1, 1820 ; i. 21 — 41. 



Ditto, as affected by Rotation: Apr. 17, 1820; i. 43—52. 



• Liglit, Composition and Eesolution of: Feb. 16, March 15, 1852; ix. 



399—416. 

 Political Economy, Mathematical discussion of: March 2, 14, 1829; iii. 



191—230. 



Ditto, as expounded by Ricardo. First memoir : Apr. 18, May 



2, 1831; IV. 155—198. 



Ditto, Mathematical Theory of, Second memoir: Apr. 15, 1850; 



IS. 128—149. 



Ditto, Ditto, Third memoir: Nov. 11, 1850; IX. [1—7.] 



Potassium, Apparatus for procuring: Nov. 26, 1821 ; i. 343 — 345. 



Pressure on a flat Plate opposed to a Stream of Air: Apr. 21, 1828; iii. 



129—140. 

 Primitive Ridge of Devonshire and Cornwall: March 20, 1820; I. 89 — 146, 

 Probabilities, Question in the Theory of : Feb. 26, 1837 ; vi. 423 — 430. 



Foundation of Ditto: Feb. 14, 1842; viii. 1—6. 



Fundamental principle of the Theory of: Nov. 13, 1854; ix. 605 — 607. 



Proportions, see Geometry. 



Propositions numerically definite: March 16, 1868; xi. 396^411. 

 Purbeck Strata of Dorsetshire : Nov. 13, 1854; ix. 555 — 581. 



Quartz, Natm-e of the Light produced by : Feb. 21, 1831 ; iv. 79—123. 

 . Ditto, Ditto, Ditto, Apr. 18, 1831 ; iv. 199—208. 



Railway Accidents, Causes of Fatal, &c.: Nov. 29, 1841 ; vii. 301 — 317. 

 Railway Bridges, Equation relating to their breaking: May 21, 1849; viii. 



707—735. 

 Rainbow, Problem of, Mathematically considered : Dec. 14, 1835 ; vi. 



141—152. 

 Rainbows, Spurious: March 22, 1841; vii. 277—286. 

 Reed Organ Pipes: Nov. 24, 1828, March 16, 1829; in. 231—262. 

 Reflection and Refraction of Light: Dec. 11, 1837; vii. 1 — 24. 



Supplement to this memoir: May 6, 1839; vii. 113 — 140. 



. Ditto, Ditto, &c.: Nov. 28, 1842; VIII. 7— 26. 



Refraction, Theory of Double : May 17, 1847 ; viii. 524—532, 

 Ricardo, see Political Economy. 



Rock Masses, Internal j)ressure of: May 3, 1847; vlii. 456 — 470, 

 Rocks, Weathering of: March 2, 1868; xi. 387—395. 

 Root of any Function : May 7, 1866 ; xi. 239—266. 

 Root-limitation, Cauchy's Theorems of: Feb. 16, 1874; xii. 395 — 414, 

 Rotatory Motion of Bodies': May 6, 1822; ii. 11—20. 



Secular CooUng of the Earth : Dec. 1, 1873 ; xii. 414—433. 

 Series, on Divergent: March 4, 1844; viii. 182—203. 



Critical Value of Periodic: Dec. 6, 1847; viii. 533—583. 



Numerical calculation of Infinite: March 11, 1850; ix. 166 — 187, 



