*1V. CONTENTS, 



CHAPTER XII. 



THE SUN AND SUNLIGHT. 



Professors Thomson, and Tait, on the Sun. The Sun a huge furnace.- 

 Herschell on the waste heat of the Sun. Temperature of space. 

 Our view of the universe.' The solar system an inhabitant of it. ' 

 The Sun a stomach.- The atmospheres, the flesh and bones of the 

 solar system. Movements regulated by Magnetism. The Sun an 

 inhabited world. How Sunlight is caused by magnetism. The 

 Sun, Earth, and Planets, Magnetic batteries. Sun the main bat- 

 tery and head office. Planets telegraph stations. Sunlight caused 

 in a similar way to the spark at the poles of a battery. The 

 " Journey to the" Sun." 69 76 . 



CHAPTER XIII. 



COLOUR. 



tlndulation theory of colour. What is the force which governs colour. 

 Primary causes overlooked as usual. Great display of Arithmetic. 

 Looseness in Science. When we will freeze to death. Portland 

 Scientific Convention. Tyndall on the vibratory theory. 474,- 

 439,680,000,000 red waves a second. This theory questioned. No 

 colour on the Earth. Herschell. Ilelmholtz. Science like a 

 voyage of discovery. We introduce the atornagnetic theory of 

 colour.-- -Colour a property of matter. Colours of mineral flames. ' 

 Why is the sky blue ? Tyndall's " Scientific use of the Imagina- 

 tion." -The setting sun red. The hills purple 77 83. 



CHAPTER XIV. 



ELECTRICITY. 



All light is Electricity. Greatest Scientific delusion of the day. -Magne- 

 tism and Electricity essentially different. Quotations to show how 

 little is known about either. Dr. Thomson. Parker's School 

 Book of Philosophy. Sir Wm. Thomson on Electricity flowing. 

 Prof. Tyndall also confesses ignorance. Prof. Grove Prescott's 

 History. Electric spark, what composed of. No combustion with- 

 out a mixture of the two classes of matter. The cause of 

 lightning 84 89. 



CHAPTER XV. 



MAGNETISM. 



Explanation chapter. To show difference between Magnetism and Elec- 

 tricity. Profs. Grove and Faraday. Electricity not a force at all. 

 Arrangement of a galvanic battery. How telegraphing is accom- 

 plished. Telegraph worked by grass. A few facts about magne- 

 tism. Well known and not generally known. Faraday's misfor- 

 tune. Born too soon. The " Magnetic curves " explained. 

 Tyndall astray again. Polarity of iron railings. How the polarity 

 of magnetism changes with position. Sir Isaac Newton's apple. 

 The law of gravitation upset. How magnetism is a weight, and 

 how it affects weight. What Newton wished to discover. The 

 cause of deviation in iron ships 90-^-101. 



