Works published ly 1). Appleton <> Co. 



HEAT, 



CONSIDERED AS A MODE OF MOTION, 



Being a Course of Twelve Lectures delivered before the 

 Royal Institution of Great Britain. 



BY JOHN TYNDALL, F. E. 8., 



or NATITRAI. PHILOSOPHY IN THE EOYAL INSTITUTION AUTHOB OF ni* 



"GLACIEBS OF THB ALPS," ETC. 



With One, Hundred Illustrations. Svo, 480 pages. Price, $2. 



From the American Journal of Science. "With all the skill which has 

 made Faraday the master of experimental science in Great Britain, Professor Tyndall 

 enjoys the advantage of a superior general culture, and is thus enabled to set forth hia 

 philosophy with all the graces of eloquence and the finish of superior diction. With a 

 simplicity, and absence of technicalities, which render his explanations lucid to un- 

 scientific minds, and at the same time a thoroughness and originality by which he in- 

 structs the most learned, he unfolds all the modern philosophy of heat. His work takea 

 rank at once as a classic upon the subject 



New York Times. Professor Tyndall's course of lectures on heat is one of the 

 most beautiful illustrations of a mode of handling scientific subjects, which is com- 

 paratively new, and which promises the best results, both to science and to literature 

 generally ; we mean tile treatment of subjects in a style at once profound and popu- 

 lar. The title of Professor Tyndall's work indicates the theory of heat held by him, 

 and indeed the only one now held by scientific men it is a mode of motion. 



Boston Journal. He exhibits the curious and beautiful workings of nature in 

 A most delightful manner. Before the reader particles of water lock themselves or fly 

 asunder with a movement regelated like a dance. They form themselves into liquid 

 flowers with fine serrated petals, or into rosettes of frozen gauze ; they bound upward 

 In boiling fountains, or creep slowly onward in stupendous glaciers. Flames burst into 

 music and sing, or cease to sing, as the experimenter pleases, and metals paint the Q- 

 elves upon a screen in dazzling hues as the painter touches his canvas. 



New York Tribune. The most original and important contribution that ha* 

 yet been made to the theory and literature of thermotics. 



Scientific American. The work is written in a charming style, and is the 

 most valuable contribution to scientific literature that b ia been published in many 

 years. It is the most popular exposition of the dynamical theory of heat that has yet 

 appeared. The old material theory of heat may be said to be defunct. 



Louisville Democrat. This is one of the most delightful scientific works we 

 btye ever met The lectures are so full of life and spirit that we can almost imagin 

 the lecturer before us, and see his brilliant experiments in every stage of their progress. 

 The theory is so carefully and thoroughly explained that no one can fail to understand 

 St. Such books as these create a love for science. 



Independent. Professor Tyndall's expositions and experiments are remarkably 

 thoughtful, ingenious, clear, and convincing ; portions of the book have almost th 

 Interest of a romance, so startling are the descriptions and elucidations 



