246 PROCEEDINGS OP THE AMERICAN ACADEMY. 



Potassic Phenoxychloracrylate, KC 3 H(OC 6 H 5 )C10 2 . 



When a hot aqueous solution of phenoxychloracrylic acid is neutral- 

 ized with potassic carbonate, and partially evaporated, potassic phe- 

 noxychloracrylate separates from the concentrated solution in well 

 formed plates, which may be recrystallized from hot water, although 

 quite soluble in the cold. 



These crystals are permanent in the air, and lose no weight at 110°. 

 The air-dried salt was analyzed with the following results : — 



I. 0.3310 gram ignited with H 2 S0 4 gave 0.1206 gram K 2 S0 4 . 

 II. 0.1929 gram ignited with H 2 S0 4 gave 0.0707 gram K 2 S0 4 . 



Calcic Phenoxychloracrylate, Ca[C 8 H(OC 6 H 5 )C10 2 ] 2 .5 H 2 0. 



A hot aqueous solution of the acid is neutralized with calcic car- 

 bonate and concentrated, when the calcium salt crystallizes out in 

 clusters of long needles, which are permanent in the air. They lose 

 most of their crystal water over sulphuric acid, and the whole at 110°. 



I. 0.7847 gram air-dried salt lost at 110° 0.1343 gram H 2 0. 

 II. 0.3240 gram air-dried salt, ignited with H 2 S0 4 , gave 0.0847 gram 

 CaS0 4 . 



Calculated for Found. 



Ca[C s H(0C 6 H 5 )C10 2 ] 2 .5H 2 0. I. II. 



Water 17.14 17.12 



Calcium 7.62 7.69 



0.1684 gram salt, dried at 110°, gave, on ignition with H 2 S0 4 , 0.0525 

 gram CaS0 4 . 



Calculated for 

 Ca[C 3 H(OC r) H 5 )C10 2 ] 2 . Found 



Calcium 9.19 9.17 



Baric Phenoxychloracrylate, Ba[C 3 H(OC c H 5 )C10 2 ] 2 . 5 H 2 0. 



The hot aqueous solution of the acid is neutralized with baric car- 

 bonate, evaporated until a thin film appears on the surface, and then 

 allowed to cool, when the barium salt separates in clusters of long 

 silky needles. These crystals appear to be slightly efflorescent, losing 

 on exposure to the air for several days less than a molecule of water. 



