NOTICE. 



THK war in South Africa has delayed the publication of the Second Edition 

 of "What is Life?" This delay has enabled the author to revise his work 

 "What is Heat?" and to add to it the consideration of the important 

 fundamental problem, "What is Electricity?" Many new and very 

 important fundamental experiments are described and explained, and a 

 summary showing the actual natural reactions when gases are liquefied. 

 The work is now published at the low price of 6.9., by MESSRS. CHAPMAN 

 & HALL, LTD. The title of the new edition is, " WHAT IS HEAT AND 

 WHAT IS ELECTRICITY?" 



LONDON, November, 1900. 



