OF SODA. 277 



1 atom succinic acid 6*25 

 1 atom soda 4 



6 atoms water 6-75 



17 



so that it resembles the acetate of soda exactly 

 in its constitution. 



17. Oxalate of soda. I have never been able 

 to obtain this salt in regular crystals. It usually 

 forms white opaque crusts ; once I got it in 

 small round globules rather beautiful, and pro- 

 bably composed of small prisms diverging from 

 a centre ; it contains no water of crystalliza- 

 tion ; but the integrant particle of the salt, dried 

 in the open air, usually contains about ith of an 

 atom of water, lodged mechanically between the 

 fibres of the mass. Its constituents (when this 

 water is driven off by a moderate heat) are 



1 atom oxalic acid 4'5 

 1 atom soda 4 



8-5 



18. Binoxalate of soda. This salt is easily 

 formed by digesting a solution of 9 parts of oxalic 

 acid crystals on 9*5 parts of oxalate of soda. A 

 complete solution takes place, and when the so- 

 lution is concentrated it readily deposites fine 

 crystals of binoxalate of soda, which have the 

 form of flat rectangular prisms, the larger faces 

 of which consist of rhomboids with angles of 



S3 



