N'tENTd. 

 CHAPTER IX. 



CHEMICAL ACTIOX. STEAM BOILER DXPLOBIOXS. 



A Knowledge of chemical action requisite. Nothing known about it by 

 scientific writers. Prof. Grove. Chemical action only one form of 

 atomagnetism. Great separator. Attraction the great builder. 

 Repulsion the great designer. Chemical action the great destroyer. 

 How sugar dissolves in water. How a nail dissolves. Con* 

 centrated acid not so good a dissolver as diluted acid. Soda powder, 

 Sulphuric acid. 'Amusement for speculative philosophers.- How 

 water evaporates. No latent moisture in the atmosphere. No 

 latent dryness in the sea. STEAM BOILER EXPLOSIONS. Facts 

 tonnected with explosions. The materials dealt with --The manu- 

 facture of hydrogen gas. What the United States Commissioners 

 on explosions have diecovered. How explosion takes place. Not 

 by pressure. Mingling of gases. Prevention 43 51. 



CHAPTER X. 



Heat the result of chemical ection between certain classes of atoms. 

 Dynamical theory of heat. Motion. Tyndall on heat. Christo- 

 pher Columbus and his followers. No ambition among scientific 

 men. Heat produced in three ways. Natural heat. Combustion. 

 Friction.- 1 Ice meltings Hot springs and Geysers of California. 

 Volcanoes caused by chemical action. Why coal burns. Poker 

 experiment. Conductive power of heat. Tyndall's experiments. 

 Laboratory experiments incorrect. Atomic action likened to a 

 gossamer thread. How the Crusade against the present system of 

 science will be conducted. Ruskin's Crusade against Renaissance 

 Painting, and Architecture. Grove and Lardner ........ 52 61. 



CHAPTER XI. 



Light caused similarly to heat. Propagated differently. Three division!. 

 Light without heat. Light with heat. Propagated light. 

 Auroras explained. Phosphorescence. Tyndall refuted on mole- 

 cular motion. Fire-flies. Lighting gas oy the finger. Auroras 

 from trees. Candle a guide to light. Four things required to b 

 looked at. The flame. The heat. The light. And light as aft 

 object. All light, reflection. The undulating theory disputed. 

 Light instantaneous. Light cannot travel half a mile. Sight 

 travels 286,000 miles a second. Flame not seen in daylight. 

 Astronomical fallacy of star-light. Undulation follows Emission 

 into oblivion. Tyndall's security for the continued acceptance of 

 the Unuulatory theory, overthrown 62 6&. 



