676 



INDEX. 



section, 436 ; artesian well at Stowmarket, 439 ; 

 Offton stream, 441 ; drift, 442 ; drainage by tapping, 

 443 ; disturbances in Suffolk posterior to crag, ib. 

 Plane-polarized light, crucial experiment for determin- 

 ing direction of vibrations in, 4 

 Planets beyond Jupiter, temperature of, 662 

 Plato, Intellectual Powers according to, 598 



Plato's notion of Dialectic, 690 



Surrey of Sciences, 582 



view of Arithmetic, 583 



of Astronomy, 583 



of Geometry, 583 



of Harmonics, 588 



Pointed branches of curves, controversy respecting, 626 



Polar correlation, 528, 530, 534 



correlation of surfaces, 539 



transformation, 529, 541 



Polarity, test of, arrived at by Ampere, 546 



Polarized light, composition and resolution of streams 

 of, 399 



elliptically, investigations concerning, 400 



oppositely, interference of, 404 



equivalent groups of, 408, 411 



intensity of, mixture of independent streams 



of, 407 



Political Economy, mathematical exposition of, II. 128 ; 

 III. [1] 



Polyhedron inscribed in surface, general considera- 

 tions, 458 



Primary solutions, Lagrange's theory, 535 



Primary solution of biordinal partial equation, 536 



Primordinal, defined, 516 



Probabilities, fundamental principle of theory of, 605 



Theory of, Prof. De Morgan on its application 



to cases of testimony, 116 sqq. 



Proclus, explanation of his use of SKoyos, 111 n. 



Production, equation of increased cost of, 135 



Prices, relation of import of bullion to, [I] 



Purbeck strata of Dorsetshire, 555 



Purbecks, lower, 562 

 ■ middle, 558 



1 upper, 557 



Regular solids known in Plato's time, 584 



Ridgway, section, 562, 574 



Rings formed by curved dimmed mirror, [163] 



i thrown on a screen by concave dimmed mirror, 



[150] ; conditions of distinctness of, [153] 

 Rohrs, J. H., Esq., on the oscillations of a suspension 



chain, 379 ; index to the above, 398 

 Rotation of plane of polarization of diffracted light, 



experiments in, 35 



Science, History of, of the transformation of hypo- 

 theses in, by Dr Whewell, [139] 

 Self-compensating variables, 516 

 Self-repeating series, 471 



Series, infinite, numerical calculation of a class of, 166 



Shaded surface, 533 



Similar points of curves, 610 



Singular points of curves, 608 



methods of treating the inquiry into, 612 



Singular solutions, criterion for distinguishing intra- 

 neous and extraneous, 521 



of differential equation of the first order, [107] 



of primordinal equation, 519 



Solar heat, data for determining augmentation of tem- 

 perature of earth by, 645 



different effects of at equator and pole, 651, 655 



Solid angle, measure of entire curvature of a, 454 



Solid geometry, deficient in Plato's time, 584 



Sound, amount of retardation and diminution of, by 

 friction of the air, [95] 



Space, H. Wedgwood, Esq., on the knowledge of body 

 and space, 157 



Spectra formed by luminous point seen through a 

 grating, 38 



Stoke-by-Ipswich, sand-hills, 435 



Stokes, Prof, on the Colours of Thick Plates, [147]; 

 coloured bands seen in coated mirror, [149] ; rings 

 thrown on a screen by concave dimmed mirror, 

 [150]; conditions of distinctness of, [153] ; bands 

 formed by plane dimmed mirror, [157], [167] ; 

 rings formed by curved dimmed mirror, [163] ; 

 nature of deflection of interfering streams of light, 

 [169]; investigation of angles of diffraction, [173] 



on the Dynamical Theory of Diffraction, 1; 



assumptions with regard to luminiferous ether, 

 2, 26 ; Poisson's investigations of propagation of 

 disturbances in elastic media, 3 ; crucial experiment 

 for determining direction of vibration in plane- 

 polarized light, 4 ; preliminary analysis, 6 ; inves- 

 tigation of propagation of disturbance in elastic 

 medium, 11 ; wave of dilatation, 12 ; of distortion, 

 13; general relation of initial displacement to dis- 

 turbance of any material system, 14 ; determination 

 of law of disturbance in secondary wave of light, 

 27 ; luminiferous ether, treated as an elastic solid 

 for motions producing light, 28 ; experiments on 

 rotation of plane of polarization of diffracted light, 

 35 ; spectra formed by luminous point seen through 

 a grating, 38 ; table of rotations of planes of polariz- 

 ation of diffracted light, 46 ; experiments on plane 

 of polarization of diffracted light compared with 

 theory, 47 



on the Composition and Resolution of Streams 



of Polarized Light from different Sources, 399 ; 

 investigations concerning elliptically polarized light, 

 400 ; interference of streams oppositely polarized, 

 404 ; intensity of mixtures of independent streams 

 of polarized light, 407 ; equivalent groups, 408, 411 ; 

 examples, 413 

 on the Effect of Internal Friction of Fluids 



on Motion of Pendulums, [8]; different effects 



