CONTENTS. 



PAGE 



Tbe Fuel of the Sun 7 



Dr. Siemens' Theory of the Sun 38 



Another World Down Here. 41 



The Origin of Lunar Volcanoes 50 



Note on the Direct Effect of Sun-Spots on Terrestrial Climates. . 56 

 The Philosophy of the Radiometer and its Cosmical Revelations. 59 



On the Social Benefits of Paraffin 65 



The Solidity of the Earth 72 



A Contribution to the History of Electric Lighting 75 



The Formation of Coal 88 



The Solar Eclipse of 1871 93 



Meteoric Astronomy : 104 



The " Great Ice Age" and the Origin of the " Till " 112 



The Barometer and the Weather 140 



Tiie Chemistry of Bog Reclamatipn .*. 159 



Aerial Exploration of the Arctic Regions 170 



The Limits of our Coal Supply 189 



" The Englishman's Fireside" 213 



" Baily's Beads" 221 



The Coloring of Green Tea 223 



"Iron Filings" in Tea 227 



Concert-Room Acoustics 231 



Science and Spiritualism 237 



Mathematical Fictions 251 



World-Smashing 257 



