386 



MR C. G. WILLIAMS' RESEARCHES ON 





Experiment. 





Calculation. 







"I. 



IT? 



— """ 





"~" — 



Carbon, 



31-87 



. . ■ 



32-05 



C 18 



108 



Hydrogen, . , 



2-77 





2-37 



H 8 



8 



Nitrogen, 



. 





4-15 



N 



14 



Chlorine, 



. 



20-97 



21-07 



ci 2 



71 



Uranium, 



. 





35-61 



Ur 2 



120 



Oxygen, 



• * 



- * * 



4-75 



o 2 



16 





100-00 



337 



The formula — 













C 18 H 7 N, H CI, + (Ur 2 2 ) CI, 



appears, therefore, to be the correct expression of the analysis, and it agrees in 

 constitution with the anhydrous ammoniochloride of uranyl of Peligot. It is 

 my intention to examine the double compounds of uranium with other organic 

 bases. 



Binoocalate of Chinoline. — The great discrepancy in the results of Runge and 

 Hofmann with regard to the oxalate of chinoline, made me desirous of ascertain- 

 ing the nature of this salt. According to the former chemist, leukol (chinoline) 

 has such a great tendency to form a crystalline oxalate, that this property is its 

 marked characteristic ; Hofmann, on the other hand, could only obtain it in the 

 form of a confused, radiated, glutinous mass, deposited when the solution had 

 reached a certain state of concentration. I found, however, that if 24*3 parts of 

 chinoline are added to 16*5 parts dry oxalic acid, dissolved in a small quantity of 

 water, the whole solidifies to a white crystalline mass, of the consistence of soft 

 cheese. The salt cannot be obtained pure by a random admixture of the ingre- 

 dients, as, although the chief tendency appears to be to form the binoxalate, yet 

 other compounds are also formed in sufficient quantity to prevent constant ana- 

 lytical results from being obtained, unless the above proportions are used. The 

 salt, before being employed for analysis, must be recrystallized from alcohol once 

 or twice, when it forms fine silky needles. It is partially decomposed by expo- 

 sure for two days to 212°, with evolution of chinoline, a salt being formed inter- 

 mediate in composition between the binoxalate and quadroxalate. It is necessary, 

 therefore, to dry it for analysis in vacuo over sulphuric acid. 



{6-995 grains of binoxalate of chinoline, dried in vacuo, gave 

 15,407 ... carbonic acid, and 

 2,798 ... water. 



Carbon, 

 Hydrogen, 



Nitrogen, 

 Oxygen, 



Experiment. 





Calculation. 





60-07 



60-27 



^22 



132 



4-44 



4-11 



H 9 



9 





6-39 



N 



14 



... 



29-23 



°8 



64 



100-00 



219 



