334 Report of the Department of Chemistry of the 



These salts were united and dissolved in the least possible amount 

 of 0.5 per ct. hydrochloric acid and alcohol added to the solution 

 until a faint permanent turbidity remained — which was just cleared 

 up by the addition of a few drops of dilute hydrochloric acid. The 

 solution was then allowed to stand at room temperature for about 

 two clays. There separated slowly a heavy white crust on the bottom 

 of the flask. Under the microscope this showed no definite crys- 

 talline structure. The substance was filtered off, washed thoroughly 

 in water, alcohol and ether and dried in the air. It was free from 

 chlorides and gave no reaction with ammonium molybdate. For 

 analysis it was dried at 105° in vacuum over phosphorus pentoxide. 



Found: C = 6.07; H = 1.35; P = 16.77; Ba = 40.00; H 2 = 10.08 

 per ct. 



The carbon found is undoubtedly somewhat too low, as this heavy 

 compact substance burned with extreme difficulty. 



The filtrate from the above was precipitated with alcohol, the 

 precipitate filtered, washed and dried in vacuum over sulphuric 

 acid. The following result was obtained on analysis: 



Found : C = 7.63 ; H = 1 .57 ; P = 16.53 ; Ba = 36.92 per ct. 



The heavy crust-like substance was recrystallized as follows: 

 It was dissolved in dilute hydrochloric acid, filtered and about an 

 equal volume of alcohol added and the mixture allowed to stand 

 over night. The precipitate which was amorphous at first had then 

 changed into a crystalline form. Under the microscope it appeared 

 as very small globules consisting of microscopic needles. It was 

 filtered, washed free of chlorides in dilute alcohol, alcohol and ether 

 and dried in vacuum over sulphuric acid. It was a light, voluminous, 

 snow-white crystalline powder. It was analyzed after drying at 

 105° in vacuum over phosphorus pentoxide. 



Found: C = 6.60; 11=1.50; P= 17.33; Ba = 37.45; H 2 = 8.72 

 per ct. 



The amorphous preparations which remained were united (total 

 weight 52.5 grams). The substance was rubbed up in a mortar with 

 a small quantity of cold water. A considerable portion of the sub- 

 stance dissolved. The insoluble portion was perfectly white and 

 opaque but it soon changed into a semicrystalline form and appeared 

 translucent. After standing for some time it was filtered and washed 

 in water and finally in alcohol and ether and dried in vacuum over 

 sulphuric acid. When dry it was again treated with water in the 

 same way. These operations were repeated three times. 



The filtrates and washings from the above were precipitated by 

 the addition of alcohol and these precipitates reserved for exami- 

 nation as will be described later. 



The water-insoluble substance was dissolved in the least possible 

 quantity of dilute hydrochloric acid (about 5 per ct. strength), the 



