Things not generally Known 

 Familiarly Explained. 



CURIOSITIES OF SCIENCE, 



fast an* present. 

 A BOOK FOR OLD AND YOUNG. 



BY JOHN TIMES, F.S.A. 



AUTHOR OF THINGS NOT GKNERALI.Y KNOWN; AND EDITOR OF THE 

 YF.AR-BOOK OF FACTS. 



Model of the Safety-Lamp, made by Sir Humphry Davy's own hand 

 in the possession of the Royal Society. 



LONDON: 

 KENT AND CO. (LATE BOGUE), FLEET STREET. 



MDCCCLYIII. 



