comprises authentic portraits of our greatest inventors and discoverers in 

 astronomy, chemistry, engineering machinery, and other departments of 



science The grouping of so large a number of figures must have 



been a difficult task ; this has, however, been successfully accomplished 

 by John Gilbert, the designer of the original picture, who, by a skilful 

 combination of various attitudes, has given both grace and ease to the 

 figures represented. The engraving has been executed by William Walker 

 and George Zobel, and the greatest care seems to have been taken to 

 secure faithful and authentic likenesses. The work is rendered complete 

 by a series of well-written memoirs, compiled to accompany the engrav- 

 ing. This book is also published separately, and we should think there 

 would be many who would buy the memoirs although unable to purchase 

 the engraving. 



