32 GENERAL INDEX. 



Page 



Levers, compound, observations on MECHANICS, t. ii. . 10 



Lift, or lifting pump, construction of ..... HYDRAUL. 10. PNEUM. 23 



. . and force pump ....... . . 4 



Light, nature and properties of ...... OPTICS . 1 



consists of separate and independent parts . . ... 2 



coloured rays of, observations on .... PRELIMINARY TREAT. . 23 

 its effects on vegetables ..... PREL. TREAT. 27. OPTICS 64 



its effects on changing the colours of bodies . . OPTICS . . .64 



beams of, converging and diverging, cause of . . . , 67 



. . diverging rays of, reflected from plane, concave, and convex 



mirrors ........ . . .16 



decomposition of white ...... . 



diffraction of, explained . . . . . .31 



dispersion of ........ 



. . dispersive powers of, by different bodies . . , . , 



. . duration of its impressions on the eye .... . . 



. . reflected from bodies of their own colour . . . ... 1 



. . reflexion of, general laws of ..... 



.. reflexion of, from different forms of mirrors . . . . .16 



. . refraction of, through different lenses .... . . 8 1 1 



... . . experiments on .... . . 2, 3 



.. rays of, proceed always in straight lines . . . . . 



primary colours of ..... 



their different refrangibility .... . . 



their interference ..... 



partially lost by reflexion .... . . .67 



table of . . . . . 68 



velocity of, described .... . 2 



undulations of, account of that theory . . . 



waves of ...... 



absorption of, in doubly refracting crystals . . POLAR. OF LIGHT . 



common, may produce systems of coloured rings . . 28 



pencils of, formulae for their intensity .... . 



refraction of, its connexion with polarisation . . . 29 



polarisation of, description of the phenomena . . . 



. . at the second surfaces of bodies . . . 10 



at the separating surfaces of two bodies , 



by successive reflexions . . . . 1 1 



by ordinary refractions . . . . 



experiments on, by Blot, Malus, &c. . 



by double refraction . . . . 14 



. . . Malus's researches on . . . . 



polarised, in what it differs from common light . . . 



. . . how obtained . ..... 



.. .. partially, by reflexion, state of . . . . 



after it has suffered refraction . . . 12 



. . colours produced by the action of crystallised bodies 



upon ...... 18 ' 



'. . . . cause of the colours of . . . . 



theory of . . . . . 



apparatus for experiments upon . . . 15 IS 



(interference of) experiments upon . . 



polarisation of, list of works on .... 



Lime, hypo-sulphate of, tints of its rings . ... . 



.. sulphate of, influence of heat upon . ... 



Line of direction of gravity ....... MECHANICS, t. i. . 



Lines crossing the prismatic spectrum .... OPTICS 



Liquefaction and evaporation, causes of ... HEAT . . . 



Liquids, table of their expansion by heat .... 



List of absorbing crystals with one axis .... POLAR. OF LIGHT . 



with two axes .... ^ 48 



Loading of carriages, observations on .... MECHANICS, t. i. . 



Logarithms, nature of those factitious numbers . . . PRELIMINARY TREAT. . 4 



Longitude, in geography, explanation of the term . . * 



Longsightedness, cause and remedy of ... OPTICS 



Lowering of temperature, modes of . . . . . HEAT . 



Low-pressure steam-engines, construction of . . MRC^J 

 Lunar rainbow, cause of the phenomenon 



