30 



GENERAL INDEX. 



Heat, reflected rays of, experiments concerning . . HEAT . 



specific, explanation of . . . . . . 



of different metals, table of . . . 



of the sun's rays, cause of ..... 



separated by a prism .... . . 



supportable by the human body, experiments on . 



works on referred to ...... 



zero of, according to Dr. Irvine .... . . . . 



communicates double refraction to certain bodies . . POLAR. OF LIGHT 



to glass . . . . 



its influence jn modifying the absorption of light by crystals 



upon doubly refracting crystals . . . 



upon Glauberite ..... , 



upon calcareous spar . . . . 



upon sulphate of lime . . . , 



Heated bodies, table of the times of cooling .... HEAT 



Heating power of the prismatic spectrum .... 



Heights, measured by means of the barometer . . . PNEUMATICS 



HerscheFs table of the curvature of lenses .... OPTICS 



experiments on leucocyclite, Vesuvian, &c, . . POLAR. OF LIGHT 



Hiero's crown, method of detecting its alloy .... HYDROSTATICS 



High-pressure steam-engine described .... MECHANICS, t. i. 



Highlanders of Scotland, their second sight accounted for . . OPTICS 



History, definition and utility of ..... PRELIMINARY TREAT. 



of the steam-engine ...... MECHANICS, t. i. . 



Natural, definition and objects of .... PRELIMINARY TREAT. 



Hooke's universal joint described ..... MECHANICS, t. ii. 



Horizontal water wheels, observations on . . HYDRAULICS . , 



Horse, observations on the eyes of ..... PRELIMINARY TREAT. 



the limbs and feet of . . . , 



.. strength of, compared with that of a man . . . MECHANICS, t. i. 



Howard's thermometer described ..... HEAT . . , 



Human body, experiments on the degree of heat endurable by . 



.. strength average value of ..... MECHANICS, t. i. 



compared with that of a horse . . . 



Humours of the eye, refractive powers of 



Page 

 29,30 

 . 33 

 39 



. 63 

 28 



. 55 

 63,64 

 . 40 

 . 48 

 48 

 48 

 62 

 63 

 63 

 63 

 32 



. 28 

 10 



. 22 

 34,35 

 16 



. 32 

 59 



a 



32 

 12 

 62 

 20 

 21 

 31 

 29 

 19 

 55 

 28 

 29 

 41 

 17 

 46 

 30 



. OPTICS . 



Hungarian machine, description of ..... HYDRAULICS 

 Hunter's screw, described ...... MECHANICS, t. ii. 



Hunting cog, description of ...... 



Hydraulics defined .... PREL, TREAT. 19. HYDROST. 1. HYDRAUL. 1 

 Hydraulic machines, account of various .... HYDRAULICS to end. 



works on referred to ..... 32 



Hydrodynamics, definition of ..... PREL. TREAT. 19. HYDROST. I 



Hydrometer, principle of ...... HYDROSTATICS . 13 15 



Hydrostatics, denned .... PREL. TREAT. 19. HYDROST. 1. HYDRAUL. 1 



mathematical illustrations of . 



works on, referred to .... 



Hydrostatic balance described ..... 



bellows ...... 



. . paradox ...... 



- .. press, Bramah's ..... 



-Hyperbola, description and properties of that curve . 



Hypo-sulphate of lime, tints in the rings of . 



Ice, crystals of, float in the atmosphere .... 



.. method of procuring in India . 



. . tables of frigorific mixtures with and without that ingredient 

 spar, its double refraction and composition described 

 ,?, tints of its coloured rings ..... 



iting power of the prismatic spectrum 



'ions, mathematical, of hydrostatics . . . 



formed by lenses ....... 



by plane mirrors ..... 



by concave and convex mirrors 

 multiplication of, iu calcareous spar 



explanation of the phenomena 

 imitation by artificial combinations 

 ^ability of air asserted , % 



HYDROSTATICS 



2730 

 31,32 

 14 



HYDROST. 8. MECH. t. i. 23 

 PRELIMINARY TREAT. 7 

 POLAR. OF LIGHT . 35 



OPTICS . 

 HEAT 



POLAR. OF LIGHT 



OPTICS 



HYDROSTATICS 



OPTICS 



POLAR. OF LIGHT 





. 55 

 54 



. 60 

 1 



. 35 

 29 



2730 

 12 



. 18 



19,20 

 61 

 61 

 62 



