GENERAL INDEX. 23 



Page 



Boiling, phenomenon of explained . . . . . HYDROSTATICS . 18 



poinl of water under different pressures . . . HEAT . . 49 



points of various fluids, table of .... HEAT . . 50 



of water in vacuo, and under very high pressure . . . 50, 51 



Botany, definition of, and objects of the science . . . PRELIMINARY TREAT. 12 



Brady's balance, description of . .... MECHANICS, t. ii. . 21 



Bramah's fire engine described ...... HYDRAULICS . . 16 



hydrostatic press, principle of . . . HYDROST. 8. MECH. i. 23 



Brazilian topaz, structure of ...... POLAR. OF LIGHT . 57 



Breast, water-wheel described ..... HYDRAUL. 25. MECH. t. i. 21 



Brtnt'ster's general law of the phenomena of coloured rings . POLAR. OP LIGHT . 27 



theory' of rectangular axes .... . 35 



Bucket engine described ...... HYDRAUL. 9. MECH. t. i. 21 



Built-up lenses for burning-glasses ..... OPTICS . . .12 



Burtons, Spanish, a species of pulleys ... MECHANICS, t. ii. . 36 



Calcareous (or Iceland) spar, its composition and refractive qualities POLAR. OF LIGHT . 1 



.. multiplication of images in . . . 61 



... .. explanation of this phenomenon 61 



imitation by artificial combina- 

 tions .... . 62 



influence of heat upon . . . 63 



Calculation of the discharge of pumps . . . HYDRAULICS . 16 



velocity of rivers ..... . . 5 



Caloric, definition of ....... HEAT . . 1 



specific, explanation of ..... . . . .33 



Calorimeter, an instrument for measuring heat ... . . . 34 



Camel, peculiarity in the hoofs of that animal . . . PRELIMINARY TREAT. 30 



Camera obscura, principle and description of ... OPTICS . . 14 



Gamut's machine for moving sieves described . . . MECHANICS, t. ii. . 64 



Capacities for heat, experiments on ..... HEAT . . 34 



caloric, of elastic fluids, tables of . . . . .36 



Capillary attraction, effects of described .... HYDROSTATICS . 24 



Capstans, descriptions of various kinds of . . . . MECHANICS, t. ii. 23-25 



Carriages, loading of, observations on .... MECHANICS, t. i. . 19 



Cassegrainean telescope described ..... OPTICS . . .20 



Catenary, a description of that curve ..... PRELIMINARY TREAT. 7 



Catoptrics, the name and objects of the science defined . . OPTICS . . 16 



Causes of erect vision ascertained ..... . . . .42 



long-sightedness ...... - . . 46 



. . short-sightedness ....... . . . 46 



. . single vision with two eyes .... . . 45 



squinting . . . . . . . . . . .45 



Cells of bees, construction of described .... PRELIMINARY TREAT. 25 

 Centre of gravity, explained and calculated . . . HYDROST. 18. MECH. t. i. 16 



gyration HYDRAULICS . . 28 



oscillation ........ 28 



percussion . . . . . HYDROSTATICS . 29 



pressure ........ 11,28 



Centigrade thermometer, the scale of explained . . . HEAT ... 4 

 Centrifugal mill, Barker's, described . . . . HYDRAUL. 30. MECH. ii. 55, 102 



pump, description of . HYDRAULICS . . 19 



Chain of buckets, a water engine described .... MECHANICS, t. i. . 21 



pump . ........ HYDRAULICS . . 9 



Changes on various substances by heat, table of . . . HEAT ... 20 



Character of Dr. Black . . .46 



Charcoal, its relation to the diamond . . . . . PRELIMINARY TREAT. 37 



Chemical properties of the prismatic spectrum . . . OPTICS . . 29 



science, its connection with heat .... HEAT ... 1 



Chemistry, definition and objects of ..... PREI IMINARY TREAT. 11 



Chromatic Vernier for subdividing tints, described . . POLAR. OF LIGHT . 52 



Chromatics, definition and objects of . . . OPTICS . . 22 



Chronometers, useful rules for makers of .... MECHANICS, t. iii. . 16 



Circle, definition of ........ PRELIMINARY/TR^AT. 6 



involute of, applied to mechanics . . . . MECHANICS^, ii. . 29 



Circular and rectilinear motions reciprocally converted into one 



another ......... 54 63 



polarisation in general ...... POLAR. OF LIGHT . 41 







