FOURTH EDIT 
E g M A N C E 
•* 
c? 
UOIlAkV 
THE S 'E A - S E R P E jprtf , 1 , 7 , $ v 
THE ICHTHYOSAURUS. 
ALSO, 
A COLLECTION OF THE ANCIENT AND MODERN AUTHORITIES, 
WITH LETTERS FROM DISTINGUISHED MERCHANTS 
AND MEN OF SCIENCE. 
“If wc have unearned luck 
Now to ’scape the serpent’s tongue, 
AVe wiU make amends ere long.” 
Midsummer Night’s Dream, Act V., Sc. 2. 
<*■> - 
“ But chain ten thousand fathoms down 
The sluggish calm below. ” t ' / a 
J. T. Fields. 
V-i 4 , 14 * ' & *' 
CAMBRIDGE: 
% 
PUBLISHED BY JOHN BARTLETT. 
1850 . 
