spheres, tubes, &c-, distribution of the doubly refracting 

 force of ....... 



Glauberite, influence of heat upon ... , 



phenomena of . . . 



Glow-worm, the purpose of her. shining light . . 

 Goniometer, an instrument for measuring angles . . 

 Governor, a machine for equalizing motion, described . . 

 Gradual induration, a method of producing a doubly refracting 

 structure by ..... 



Gravity, definition and laws of .... 



distinguished from impulse 



causes all bodies to descend with equal velocity , 

 .. of bodies reciprocal ..... 



line of direction of ..... 



force of ...... 



centre of explained and calculated . . 

 specific, explanation of .... 



Gravities, specific, of various bodies, tables of 

 Gregorian telescope, description of . . . 



Gridiron pendulum (Harrison's), described . . . 

 Gyration, centre and circle of, explained and calculated 



Haloes and parhelia, causes of these phenomena . . 

 Harrison's gridiron pendulum, described . . , 



Han-, the third eyelid of a horse, described . . 



Heat, nature and cause of ...... 



absorption of ...... 



absolute, in bodies at different temperatures . . 

 its connexion with chemical science . 

 conductors of . . 



experiments on 

 capacities for, experiments on .... 



tables of 



change of colours of bodies by 



expansion of bodies by ..... 



air by, table of .... 



liquids by, table of ... 



experiments on . 

 solids by, application to the arts 



table of .... 

 general agency of ..... 



considered as a mechanical agent . . . 



the cause of fluidity . 

 latent, experiments concerning 



in vapours, table of . . 



weight of, attempt to ascertain the . . 

 produced by means of friction, experiments of . 

 radiant, velocity of its motion . . . . 

 radiation of, its laws explained . 



51 



63 

 ^33 



31 

 8 

 52 



53 



PRELIMINARY TREAT. 13 17 



PRELIMINARY TREAT. 

 OPTICS . . 



MECHANICS, t. ii. . 



POLAR. OF LIGHT . 



MECHANICS, t. i. 



HYDROST. 18. MECH. t 

 HYDROSTATICS . 



OPTICS . 

 HEAT . 



HYDRAULICS 



7 

 ]8 

 6 



16 

 13 



19 _ 21 

 20 

 10 



28 



OPTICS . . 52 _ 56 



HEAT . . .10 

 PRELIMINARY TREAT. 24 



HEAT . . i 



- . . .33 



- . . 39 



- . . 1 



- . . 21 



- . . 23, 25 



OPTICS 

 HEAT, 6. 



MECH. t. i. 



. 



MECHANICS, t. i. 

 HEAT . . 



36 

 63 

 29 

 13 

 10 

 14 



7 



. j 

 29 

 42 



. 48 



3 _ 5 

 28 

 26 





