6 CONTENTS. 



PAGE 



The Dying Trees in Kensington Gardens. 261 



The Oleaginous Products of Thames Mud: Where they Come 



from and Where they Go 266 



Luminous Paint 269 



The Origin and Probable Duration of Petroleum 273 



The Origin of Soap 281 



Oiling the Waves '. 285 



On the so-called "Crater Necks" and "Volcanic Bombs" of 



Ireland 290 



Travertine - 296 



The Action of Frost in Water-Pipes and on Building Materials. 300 



The Corrosion of Building Stones 308 



Fire-Clay and Anthracite 312 



Count Rumford's Cooking-Stoves 320 



The " Consumption of Smoke" 327 



The Air of Stove-Heated Rooms 332 



Ventilation by Open Fireplaces 337 



Domestic Ventilation 341 



Home Gardens for Smoky Towns 351 



Solids, Liquids, and Gases 367 



Murchison and Babbage 386 



Atmosphere versus Ether 389 



A Neglected Disinfectant 393 



Another Disinfectant 393 



Ensilage 394 



The Fracture of Comets 396 



The Origin of Comets 398 



