288 VEGETABLE SUBSTANCES. 



Wood Sorrel Oxalis acetosella. 



no more crystals can be obtained. In this manner 

 about nine drams of crystals may, according to 

 Scheele, be procured from two pounds of juice, 

 which is generally the produce of ten pounds of 

 wood sorrel. Savary did not obtain so great a 

 quantity ; but he did not clarify the juice before he 

 evaporated it, and was obliged repeatedly to dissolve 

 and recrystallize the salt, in order to obtain it white, 

 and probably wasted some in these different opera- 

 tions. This salt is collected in small, white, needle- 

 like crystals, not alterable in the air. It is the acidu- 

 lous oxalate of potash, or salt of sorrel, of commerce : 

 it has usually been imported from Switzerland and 



