Works hy the same Author. 



FRAGMENTS of SOIBNOE. 



Sixth Edition, revised and augmented. 2 vols, crown 



8vo. price 16s. 

 'These are only a few of the interesting subjects on which Professor Tyndall 

 offers his best thoughts and powerful expositions to his readers. ... To say that 

 these volumes are more worthy in their new form of general reading than the 

 previous editions, would be but faint praise, for they aim, with eminent success, at 

 showing how scientific methods of thought which are easily intelligible are per- 

 meating with augmenting power all masses of facts in which the human mind ftnds 

 an absorbing interest. To emancipate the minds of men from any form of slavery 

 by substituting intelligent comprehension for unreasoning formulae or wonder, has 

 ever been the first step in the liberation of human energies, so that they may produce 

 greater happiness for the individual and advance the progress of the whole com- 

 munity ; and we cannot doubt that these utterances of Professor Tyndall will g« 

 far towards creating a new element of religious belief in this country, by demon- 

 strating that science is legitimately extending her influence beyond the elementary 

 principles expounded in text-books to the practical application of those principles 

 among the phenomena of life.' Westminster Review. 



HEAT a MODE of MOTION. 



Sixth Edition (Thirteenth Thousand) thoroughly revised 

 and enlarged ; with a Plate and 110 Woodcuts and 

 Diagrams. Crown 8vo. price 12s. 



' students will be glad to see a new edition of this very valuable treatise on heat, 

 which during the last two years has been out of print. Professor Tyndall, not 

 satisfied with a mere re-issue, has re- written several chapters, and introduced much 

 fresh matter to bring the information conveyed up to the latest discoveries in the 

 science of thermodynamics. The historical development of the dynamics of heat 

 has been more fully elucidated, and new chapters on electrical heat have been intro- 

 duced. The work is too well known to need either praise or description ; it is 

 exhaustive of its subject, and the materials so well arranged, so clearly and dis- 

 tinctly explained, that the book is not only of high value to the student, but may be 

 read by every one who desires to keep abreast of the scientific knowledge of the 

 day. The volume is profusely illustrated, and it is easy to foresee that the present 

 edition will pass out of print as rapidly as its predecessors.' Standard. 



' Professor Tvndall's well-known treatise on the mechanical theory of heat has 

 now been out of print for a considerable time, so that the appearance of this sixth, 

 revised and enlarged edition, will be welcomed by many students. Founded as it is 

 upon his lectures delivered at the Royal Institution, and retaining the lecture form 

 in its chapters, whUe the numerous experiments which the Professor dehghts to 

 bring before his audiences are copiously illustrated by figures of apparatus in use, 

 the style in which the information is conveyed to the reader has a freshness and 

 vigour about it hardly attainable by any drier mode of treatment, and one is at no 

 loss to understand the great popularity that this book has so l(|ag enjoyed. In his 

 new edition Professor Tyndall has evidently been careful to work in the most 

 recent results of physical researches in the somewhat wide field that he vmdertakes 

 here to open up to his readers, his book, as is well known, discussing a host of phe- 

 nomena with which heat is more or less immediately concerned.' 



Popular Science Review. 



London, LONGMANS & CO. 



