OTHER WORKS BY THJE SAME AUTHOR. 



Octavo, illustrated with steel and wood engravings. Price 2\s. 



THE LIFE, TIMES, AND SCIENTIFIC LABOURS OF 



EDWAED SOMEESET, 



SIXTH EAKL AND SECOND 

 TO WHICH IS ADDED A REPRINT OF HIS 



CENTURY OF INVENTIONS, 1663, 



WITH A COMMENTARY THEREON. 



Post Svo. with 100 wood engravings. Price \0s Gd. 



PERPETUUM MOBILE: 



OR 



HISTORY OF THE SEARCH FOR SELF-MOTIVE POWER 

 DURING THE 17th, 18th, AND 19th CENTURIES ; 



WITH AJS^ INTRODUCTORY ESSAY. 



Post Svo. with a portrait. Price Zs 6d. 



CONTEIBUTION TOWAEDS A HISTOEY OF 



ESTABLISHING THE ORIGIN OF THE ART. 



