INDEX TO VOL I. 



ABSORBRRS and radiators of heat, 26. 

 Absorbing power of bodies, 26. 

 Absorption of heat, 26. 

 Air- currents produced by heat, 27. 

 Air, latent heat of, 24. 

 Alum, effects of, on heat, 29. 

 Analogies between light and heat, 40. 

 Animal processes, products of, 33. 

 Arctic regions, cold of the, 3d. 

 Arsenic in gas, 32. 

 Atmosphere, constitution of the, 33. 

 Atmosphere, impurities of the, 33. 

 Atmospheric pressure affects the boiling- 

 point, 20. 



Atomic weights and specific heat, 26. 

 Atoms, 13. 



BATTERY, thermo-electric, 29. 

 Boiling fountains of Iceland, 30. 

 Boiling-point, depends on atmospheric 



pressure, 20. 



Boiling-points, table of, 20. 

 Boutigny's experiments on heat, 23. 

 Breguet's thermometer, 19. 

 Brick-lining for grates, 32. 



CALORIC, 13. 



Carbonic acid, fatal effects of, as produced 



from stoves, 32. 

 Carbonic acid, freezing of, 25. 

 Carbonic acid produced by combustion, 32. 

 Central forces, heat, &c., intensity of, 26. 

 Chauffer, danger of the, 32. 

 Chemical action produces heat, 15. 

 Churches, ventilation of, 31. 

 Climate and heat, 27. 

 Cloth, radiating and absorbing power of, 



28. 



Clothing, conducting power of, 22. 

 Coal as fuel, 31. 

 Coal-gas, tallow, &c., products of the 



combustion of, 33. 

 Cohesion opposed by heat, 15. 

 Combustion, 31. 

 Condensation of steam, 25. 

 Condensation of vapour, 21. 

 Conducting power, tables of, 37. 

 Conduction by metals, 21. 

 Conduction by solid bodies, 21. 

 Conduction of heat, 21. 

 Conductors, bad, 21. 

 Conductors, good, 21. 

 Conductors, table of, 22. 

 Congelation , continual on mountain ranges, 



31. 



Convection of heat, 22. 

 Cooking and heating, 31. 

 Corpuscular theory of heat, 13. 

 Cryophorus, the, 24. 

 Currents, air, and water, 30. 



DF.NMARK, temperature of, 30. 



Densities of hot and cold air, 32. 



Dew, owing to radiation of heat by the 



earth, 28. 



Dew prevented by the presence of cloud, 28. 

 Dew, production of, 26. 

 Diathermancy, 28. 



VOL. J. 



SECTION L HEAT. 



Diathermanous bodies, 28. 

 Distillation, process of, 25. 

 Double refraction, 28. 

 Draughts, cause of, 34, 

 Drying by steam, 25. 



EARTH, absorptive power of, 28. 

 Earth, cause of the heat of the, 30. 

 Earth, internal heat of the, 30. 

 Earth, radiation of the, 26, 27. 

 Earths, radiating power of, 23. 

 Effects of heat, tables of, 37. 

 Effects of expansion by heat, 16. 

 Elasticity of vapour, tables of, 37. 

 Electricity produces heat, li, 

 Ericsson's air-engine, 18. 

 Esquimaux snow-but, 31. 

 Ether, 13. 

 Evaporation. 20. 

 Expansion of gases, 18. 

 Expansion of liquids, 16. 

 Expansion of solid bodies, 1 5. 

 Expansion of water forming steam, 35. 

 Expansion produced by heat, 15. 

 Expansion, tables of, 37. 



FERTILITY of soils, caused by heat, 31. 

 Fevers, causes of, 33. 



Fire-grates, badly constructed and waste- 

 ful, 31. 



Fire-proof safes, 22. 

 Force of heat, intensity of the, 26. 

 Freezing-mixtures, 24. 

 Freezing-mixtures, tables of* 37. 

 Freezing water in a red-hot crucible, 23. 

 Freezing water by the air-pump, 24. 

 Friction produces heat, 14. 

 Fuel, combustion of, 31. 

 Fur, feathers, &<-., conducting power of, 22. 

 Fusion by electricity, 19. 

 Fusion of solid bodies, 18. 



GALVANOMETER, the, 29. 



Gas, products of the combustion of, 32. 



Gas stoves, 32. 



Gases, condensation of, 25. 



Gases, expansion of, 18. 



Gases, solidification of, 25. 



Gases, specific heat of, 26. 



Geysers, 30. 



Glass, conducting power of, 22. 



Grates, brick lining economical for, 32. 



Grates, polished reflectors for, 32. 



Gulf stream, 17. 



Gulf stream, cause of, 30. 



HANDLING red-hot lead, 23. 



Heat, absorption of, 26. 



Heat and electro-magnetism, 29. 



Heat, cause of, 13. 



Heat, conduction of, 21. 



Heat, convection of, 22. 



Heat, effects of, 15. 



Heat, focalisation of, 27. 



lle.it, introduction to, 13. 



Heat, latent, 24. 



Heat, polarisation of, 29. 



Heat produced by chemical action, 15. 



Heat produced by friction, 14, 



Heat produced by percussion, 15. 



Heat, production of, 14. 



Heat, quantities of, 26. 



Heat, radiant, addenda on, 38. 



Heat, radiation of, 26. 



Heat, reflection of, 26, 



Heat, refraction of, 28. 



Heat, sensible, measured by electricity, 2J, 



Heat, specific, 25. 



Heat-spectrum, 29. 



Heat, terrestrial, 30. 



Heat, transmission of, 29. 



Heating by hot air, 34. 



Heating by steam and hot water, 34. 



Heating-surface, proportion of, for warm- 

 ing purposes, 36. 



Heights measured by the boiling-point of 

 water, 20. 



High-pressure steam, 21. 



Hot and cold air, their densities, 32. 



Hot-water apparatus, ordinary, 35. 



Hot-water apparatus, Perkins', 35. 



House ventilation, 33. 



Houses of Parliament, ventilation of, 31. 



ICE, latent heat of, 24. 

 Iceland spar, refractive powers of, 28, 

 Internal heat of the earth, 30. 

 Inter-polar currents, 30. 



KITE'S ventilator, 34. 



LAMP-BLACK, radiating power of, 26. 



Land-breezes, cause of, 27. 



Latent heat, 24. 



Latent heat in ice, 24. 



Latent heat, loss of, 25. 



Latent heat of air, 24. 



Latent heat of steam, 24. 



Latent heat of vapours, 24. 



Latent heat, tables of, 37> 



Light, polarised, 29. 



Light, refraction of, 28. 



Liquefaction by heat, 18. 



Liquids, specific heat of, 26. 



McKiNNELL'g ventilator, 34. 

 Melloni's experiments, 29. 

 Melting-points of bodies, 18. 

 Metals, conducting power of, 22. 

 Mexico, heat of the Gulf of, 30. 

 Monsoons, typhoons, &c., cause of, 30. 



NATURE of heat, 13. 



OVEN, American, 28. 

 Over-crowding of bouses, 33. 



PERCUSSION produces heat, IS. 



Physical geography, 27. 



Polarisation of heat, 29. 



Pressure, atmospheric, 35. 



Pressure of steam, 35. 



Production of cold by the air-pump, 24. - 



Production of heat, 14. 



Pure air essential to life, 33. 



Pyrometers, Daniell'sandWedgwood'!,!!. 



