AUTHOR OF THINGS NOT GENERALLY KNOWN; AND EDITOR OF THE
YEAR-BOOK OF FACTS.
[Illustration: Model of the Safety-Lamp, made by Sir Humphry
Davy’s own hands; in the possession of the Royal Society.]
LONDON:
KENT AND CO. (LATE BOGUE), FLEET STREET.
MDCCCLVIII.
_The Author reserves the right of authorising a Translation of
this Work._
LONDON:
PRINTED BY LEVEY, ROBSON, AND FRANKLYN,
Great New Street and Fetter Lane.