INDEX. 



675 



mination of pressure, temperature, and density, 636; 

 temperaturo at upper limit, 638, 642 ; data for de- 

 termining decrement of temperature, 643; tem- 

 perature of earth, amount of decrease by diminu- 

 tion of atmosphere, 644; influence of solar heat 

 on, 645, 651 ; different effects at equator and pole, 

 651, 655 ; effect of horizontal transference, 654 ; 

 annual variations, 657; temperature, of Jupiter, 

 660 ; of planets beyond Jupiter, 662 ; of Mars, 663 ; 

 of Venus, 664 ; effects of obliquity of Venus on, 665; 

 of Mercury, 669 ; of Moon, ib. 

 Hypotheses in the history of science, Dr Whewell, 

 of the transformation of, [139] 



Image, relation of, to Reality, 599 



Impact of heavy ball in fixed horizontal beam, mathe- 

 matical investigation, 74 



Imports and Exports, equation of, [2], 138 



Impressions of sense only suggest science, 585 



Index of friction of a fluid, [13], [17] 



determination of, [64], [79] 



Induction, Aristotle's account of, criticised by Dr 

 Whewell, 63 — 72 



Insects in Dorsetshire Purbecks, 555, 559, 562 



Intellectual Powers according to Plato, 598 



diagram, 604 



Interfering streams of light, nature of deflection 

 of, [169] 



International prices, equation of uniformity of, 138 



Intrinsic equation of a curve, II., 150 



Iron, direct compression of, [188] 



Iron bars, discordance between experiments and theory 

 as to extension of, [178] 



relation deduced from experiment between force 



applied and extension of, [179] 



Isolated points, how determined, 611 



Jellett, on Inextensible Surfaces, 452 

 Jupiter, temperature of, 660 



Knowledge, relation of, to opinion, 583, 599 



Lagrange's Theorem, extension of, 553 



Laplace, strange remark of, on two cases of proba- 

 bilities, 119 



Le Sage, his theory of infinite streams of particles, 

 [144] 



Light, determination of law of disturbance in a 

 secondary wave of, 27 



Light, possible transition of emission theory into 

 undulation theory, [145] 



Lines of bending, 450, 457 



instantaneous, 464 



permanent, 465 



Longevity no natural relation to bile or gall-bladder, 

 69 n. 



Logic, Prof. Do Morgan on the Symbols of, 79 sqq. 



Xo'-yor, discrete quantity, 110, 111 



Longitude of Cambridge Observatory by galvanic 



signals, 487 

 Luminiferous ether, assumptions with regard to, 2, 26 

 treated as an elastic solid for motions producing 



light, 28 



Maclaurin's series, convergency of, 548 



Magnet, its attractions and repulsions explained by 

 vortices, [144] 



Mars, temperature of, 663 



Maxwell, J. C. Esq. on the transformation of sur- 

 faces by bending, 445 ; definitions of surface, ib. ; 

 bending of surfaces generated by straight line, 446; 

 of surfaces of revolution, 448 ; lines of bending, 450; 

 surface considered as the limit of inscribed poly- 

 hedron, 453 ; measure of entire curvature of a 

 solid angle, 454 ; conic of contact, ib. ; applicability 

 of two surfaces, 456; lines of bonding, general 

 considerations, 457 ; instantaneous, 464 ; permanent 

 465 ; polyhedron inscribed in surface, general con- 

 siderations, 458 



Mercury, temperature of, 669 



Minding, Mr, theorem of, 614 



Mirror, coated, bands seen in, [149], [150], [157], [163], 

 [167] 



Moon, temperature of, 669 



Multiple points, how determined, 611 



Music, impossibility of perfect scale in, 589 



Needham, section at, 435 

 Neptune and Uranus, long inequality of, i. 

 Newton's method of co-ordinated exponents, 608 

 parallelogram, 619 



Offton stream, 441 



Owen, Prof. R., on gall-bladder and bile, 69 n. 



Peirson, R. Esq., Theory of Long Inequality of Ura- 

 nus and Neptune, i. ; variations of elements de- 

 pending on the first power of the disturbing force, 

 ii. ; variations of the elements depending on the 

 square of the disturbing force, xxxii. ; general ex- 

 planation of the mode in which the disturbing 

 forces produce the long inequality, lv. 



Pendulums, adaptation of general equations of motion 

 to fluid surrounding, [15] ; experiments on the effect 

 of air on, by Sabine, Baily, &c, [9], [63] ; effect of 

 internal friction of fluids on, [8] ; motion of, com- 

 parison of theory and experiment [63] ; suggestions 

 for experiments on, [96] ; theoretical determina- 

 tions of effects of air on, by Poisson, Challis, Green, 

 &c, [10] 



Pheab, J. B. Esq., on the Geology of some parts of 

 Suffolk, 431 ; river Gipping, ib. ; sections of valley 

 of, 433 ; Hemingston, 434 ; section at Needham, 

 435 ; sandhills at Stoke, ib. ; Gallow's Hill pit 



