12 On the E'vistence of Organic Matter in Stalactites. 
re 
in deposition. 
acid solution, it is | 
them their various colors, - 1 would by no means call in question © 
the accuracy of the experiments of Prof. Liebig, further than — 
that as far as my observations extend, crenic acid in the presence — 
of lime, and combined with it passes over like oxalates, upo — 
ating, into carbonates, without perceptible blackening... 9) 
~ It may here be added that Prof. Johnston of England, describes _ 
a compound of alumina with renic acid, oceurring in caves of — 
crenic ac | existenc? 
in stalactites was also announced by Dr. Emmons of Albany) 
She oan wee. My results can therefore be considered but a 
the verification of those obtained by others. 
