90 



Results of a Chemical comparison of two Samples of Saleraius. 



1, Pine Street, Boston, 6th Sept., 1850. 



Firat sample, marked " Barnard." — This was a white, mealy, dry mass, com- 

 posed of powder and lumps; when reduced to powder, it presented only opaque, 

 nearly snow-white granicles. It contained besides pearlash, and its salts united to 

 carbonic acid, an odorous body derived from a fermenting val. One hundred 

 parts of this powder, afforded thirty-four parts of carbonic acid. 



Second sample, marked " Holton." — The same general appearance was pre- 

 sented by this as in the former sample. When reduced to ponder, it slightly 

 attracted moisture, and its powder was hardly as snow-white as the first sample. 

 " Neither sample contained the slightest trace of poisonous metals." The odorous 

 substance from the fermenting vat could not be found in this sample. 



One hundred parts of this sample gave 34.80 carbonic acid. 



As in the use of these substances, the amount of carbonic acid is to the con- 

 sumer the point of primary importance, it will be seen that the second sample 

 containing nearly one per cent, more than first, it also absorbs a little water, which 

 by adding to its weight would reduce the per cent, of carbonic acid probably to 

 the same standard as " Barnard." The latter seems to have absorbed all the 

 water it contained, and is therefore dry. 



Both are excellent preparations, and the first can haidly be distinguished from 

 the second. 



Respectfully, 



A. K. HAYS, 



, State Assayer. 



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