INDEX 



ABS 



A BSOLUTE expansion of liquids, 



J\. 781 ; rigidity, 152 ; weight, 33, 

 34 



Absorbing power for heat, 812 



Absorption of gases by solids, 317; by 

 liquids, 320; of heat, 812; of light 

 rays by vapours, 510 



Acceleration, 62 ; of gravity, 64 



Accidental colours, 545 



Accommodation of the eye, 517 



Accordion, 388 



Accumulated work, 46, 78 ; experiments 

 on, 46, 47, 78 



Accumulators of electricity, 618 



Achromatic lenses, 520 



Acoustics, 326 



Adhesion between solids, 154 ; plates, 

 preparation of, 156; between liquids 

 and solids, 205 ; compared with co- 

 hesion, 207 



Adjustment of eye to varying distance, 

 517 



Aerostatics and aerodynamics, 219 



Aggregation, states of, 17 



Air, expansive force of, 13 ; weight of, 

 219; vibration of, in tubes, 377 



Air-pump, 270 ; treatment of, 276 ; 

 rarefaction by, 274 ; receiver of, 272 ; 

 experiments with, 280 ; noxious space 

 of, 275 



Air-tightness of apparatus, how to test, 

 19 



Alcohol thermometer, 761 



Alloys, 790 



Amalgam for electrical experiments, 

 552 



Ampere's laws, 693 ; theory of magnet- 

 ism, 705 



Amperian currents, 701 



BAL 



Amplitude of vibration, 126 



Analysis, spectrum, 497 



Aneroid barometer, 239 



Angle of incidence and reflection, 429 ; 



of refraction, 457 

 Angular currents, 694 

 Aniline red, divisibility of, 32 

 Anisometric parallel projection, 5 

 Annealing, 773 

 Annular eclipse, 419 

 Anode, 673 

 Apparatus for making hydrogen, 225, 



226 



Aqueous humour, 516 

 Aqueous vapour, 793 ; tension of, 799 

 Archimedes' principle, 179, 188 

 Area, unit of, 7 

 Areas of figures, 3 

 Armature, 711 

 Arms of levers, 85 

 Artificial magnets, 739 

 Ascent of liquids in capillary tubes, 209 ; 



between surfaces, 211 

 Aspirator, how to construct, 264 

 Astatic needle, 745 

 Astronomical telescope, 525 

 Athermancy, 810 

 Atmosphere, 13; pressure of, 228; 



amount of atmospheric pressure, 231 ; 



electricity in, 646 

 Attraction, capillary, 209; electrical, 



553 ; magnetic, 707 

 Attwood's machine, 49 

 Axis, optic, 519 



BALANCE, 116 ; conditions to be ful- 

 filled by a good, 117; testing the 

 correctness of, 121 



