1822.] New Scientific Books. 317 



to be acid ; but It is strongly alkaline, and scarcely any quantity of 

 carbonic acid water put to it, will overcome this alkalinity. Pure 

 carbonic acid water is, however, acid to the tests. I could not be 

 convinced of the remarkable fact stated in this paragraph, till I 

 actually formed super-carbonate of lime, by super-saturating lime 

 water in the usual way, till the liquid from being milky became clear. 

 It still continued limy, and was even doubtfully so when two or three 

 times the quantity of acid was added. It should seem, then, to be 

 as impossible to obtain a neutral carbonate of lime, as it is to obtain 

 a neutral carbonate of ammonia, in the sense here attached to the 

 word neutral." — Memoirs of the Manchester Society. 



Article XII. 

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