330 PROCEEDINGS OF THE AMERICAN ACADEMY 



Calculated for Found. 



BaCiHClO^ . HoO. I. H. III. IV. V. 



H,0 5.93 5.60 5.60 



Ba 45.14 45.16 45.08 45.06 



Although the crystallized baric mucoxychlorate suffers no change 

 when exposed to the air for a week or more, after months of exposure 

 it loses in weight and the clear prismatic crystals become opaque. The 

 salt is then more sparingly soluble in water, and crystallizes in small 

 oblique prisms. These same oblique crystals are also occasionally 

 deposited together with the long rectangular prisms on evaporating in 

 vacuo the aqueous solution of the salt originally obtained. An analysis 

 showed that these oblique prisms contained a percentage of barium 

 required by a salt crystallizing with one molecule of water. Although 

 the crystalline form appeared to be persistent, we were able to detect 

 no differences in the chemical behavior of the salt, or of the acid pre- 

 pared from it, which would warrant the assumption that any radical 

 change in its structure had taken place. 



For analysis, the oblique prisms were well washed with cold water, 

 and dried by exposure to the air. The air-dried salt lost nothing over 

 sulphuric acid, and lost weight but slowly at 100°. 



0.4076 grra. of air-dried salt gave 0.3131 grm. BaSO^. 



Calculated for BaC4HC104 . HgO. Found. 



Ba 45.14 45.15 



Potassic 3fucoxi/cMorate, KoCJiClO^. — The potassium salt we pre- 

 pared by decomposing the barium salt with potassic carbonate and 

 evaporating the filtered solution in vacuo over sulphuric acid. The 

 salt separated in small tabular crystals, which were recrystallized 

 from warm water. The air-dried salt lost nothing when heated 

 at 100°. 



I. 0.4344 grm. of the salt gave 0.3334 grm. KoSO^. 



II. 0.4631 grm. of the salt gave 0.3547 grm. K^SO^. 



Calculated for Found. 



KAHCIO,. I. II. 



K 34.49 34.45 34.39. 



Argentic Mucoxychlorate, Ag.^C^HClO^. — The silver salt was made 

 by precipitating a solution of argentic nitrate with a solution of the 

 potassium salt. On heating, argentic chloride was rapidly formed. 

 On warming with a little amnionic hydrate, immediate reduction en- 

 sued. From a solution of the fr§e acid, argentic nitrate threw down 

 the neutral salt (HI-)' 



