New York Agricultural Experiment Station. 335 



free acid was then nearly neutralized with barium hydroxide; the 

 solution filtered and alcohol added until a faint, permanent turbidity 

 remained. A concentrated solution of 20 grams of barium chloride 

 was then added and the whole allowed to stand. The substance 

 soon began to crystallize in the same crystal form as the barium 

 salt from cottonseed meal, viz: in globular masses or bundles of 

 fine microscopic needles. After standing over night the crystals 

 were filtered, washed free of chlorides with water and then in alcohol 

 and ether and allowed to dry in the air. A further crop of the 

 same-shaped crystals was obtained from the mother-liquor by care- 

 fully adding alcohol and allowing to stand. After filtering, washing 

 and drying these were added to the first crop. 



The substance was recrystallized three times in the same way. 

 It was finally obtained as a light, snow-white crystalline powder. 

 It weighed about 27 grams. 



This was analyzed after drying at 105° in vacuum over phos- 

 phorus pentoxide. 



0.2483 gram subst. lost 0.0308 gram H 2 0. 



0.2175 gram subst. gave 0.0295 gram H 2 and 0.0507 gram C0 2 . 



0.1456 gram subst. gave 0.0987 gram BaS0 4 and 0.0864 gram 

 Mg 2 P 2 7 . 



Found: C = 6.35; H = 1.51; P = 16.54; Ba = 39.89; H 2 = 12.40 

 per ct. 



It was again recrystallized in the same manner and the following 

 result obtained on analysis after drying as before: 



Found: C = 6.23; H = 1.27; P = 16.17; Ba = 41.48; H 2 = 12.99 

 per ct. 



The substance was again dissolved in dilute hydrochloric acid, 

 the solution was filtered and then precipitated by the addition of 

 alcohol. The precipitate was amorphous at first but on standing 

 in the mother-liquor over night, it had changed into the usual crystal- 

 form but the globules and crystals were much smaller. After filtering 

 and washing free of chlorides in dilute alcohol, alcohol and ether 

 the substance was dried in vacuum over sulphuric acid. It was 

 analyzed after drying at 105° in vacuum over phosphorus pentoxide. 



0.2320 gram subst. gave 0.0325 gram H 2 and 0.0553 gram C0 2 . 



0.1466 gram subst. gave 0.0947 gram BaS0 4 and 0.0894 gram 

 Mg 2 P 2 7 . 



Found: C = 6.50; H == 1.56; P = 17.00; Ba = 38.01 per ct. 



As will be noticed from the above analytical results the com- 

 position does not change on repeated recrystallizations. We believe 

 therefore that the substance is homogeneous. The variation in the 

 percentage of barium evidently depends upon the formation of more 



