Geology and Natural History. 489 
with one molecule of combined water (CaHC,H,O,.H,O) aconitic 
acid =C,H,O,. Arno Behr has determined the presence of acon- 
itic acid in the melado of the West Indies, (Bericht. der deutsch. 
¢ hem, Ges., x, 251). It also exists, as is well known, in the 
Juices of the Monkshood or Wolfsbane (Aconitum Napellus), and 
of Blue rocket (Delphinium Consolida) as calcium aconitate, the 
same salt now found in sugar cane juice and sorghum. B. S. 
II. GroLtocy anp Natura History. 
1. The Climatic Changes of later Geological Times: a Dis- 
cussion based on observations made in the Vordilleras of North 
by J. D. W ; : 121 to 264, 4to. 
vu, No, 2, Part II, of the Memoirs of the Museum of Com- 
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are not compatible with density of population or with intellectual 
_Vigor”—namely, “the countries in question have become very 
roposition is sustained by citations from obse ers as to 
nishing water-surface of the basin of the Aral and Caspian, 
e dryness of the table-land of Persia, on account of which 
