226 Scientific Intelligence. 
islands, the amount of which varies greatly. In a few portions 
there are marked traces of subsidence, though on the whole 
the elevating movement has greatly predominated. This sub- 
mulation and their methods of flowing. ‘To some extent, no 
doubt, these observations relate to matters peculiar to the 
islands, and it would not be safe to consider them typical; but 
I imagine that their utility will not be less on that account. 
ne of the most pleasing studies in these islands is the 
climatology. In truth, there are about as many climates as 
there are square leagues; yet all of them seem to be reducible 
to ordinary and well known laws, and when understood form 
some of the most beautiful examples of the operations of those 
laws which can well be imagined. 
SCIENTIFIC INTELLIGENCE. 
I. CHEMISTRY AND PHysiIcs. 
bodies are said to be isomorphous when, possessing the same 
crystalline form, they are capable of crystallizing together in we 
alo- 
fundamental modification of these laws required by the progress 
molecules of water, with the disodic salt containing elevel ; 
@) anhydrous sodium sulphate, Na,SO,, with sodium chromate, 
a, 
n himself. 
H,0),.» with 
