278 SALTS 



nearly 120 and 60 not altered by exposure to 

 the air taste very sour, and it reddens vegeta- 

 ble blues powerfully. At the temperature of 

 46, 100 parts of water dissolve 1*88 of^ these 

 crystals. At the temperature of 83, the quantity 

 of crystals dissolved by 100 water is 3*49 spe- 

 cific gravity of the crystals 1 '980. 16 '375 grains 

 of these crystals, heated on the sand bath, lost 

 3'375 grains of weight ; hence, the constituents 

 are 



2 atoms oxalic acid 

 1 atom soda 



3 atoms water 



16-375 



Tartrate, jg. Tartrate of soda. This salt crystallizes 

 in fine needles having considerable lustre. Its 

 constituents are 



1 atom tartaric acid 8-25 



1 atom soda 4 



2 atoms water 2-25 



14-5 



To a solution of this salt in water, we added the 

 requisite quantity of tartaric acid to convert the 

 whole into a bitartrate, in order to verify The- 

 nard's statement, that there exists a bitartrate of 

 soda nearly as insoluble as bitartrate of potash ;* 



' Ann. de ChJm. XX VIII. 12. 



