10 Dr. E. J. Mills's Researches on Melting-point. 



rated like C ; it was crystallized three times from naphtha, 

 four times from alcohol, and animal charcoal was used. G was 

 treated on five successive occasions with a quantity, insufficient 

 to dissolve it, of the dilute aqueous hydric chloride already 

 named ; the cold filtered solution was precipitated with am- 

 monia. Of the successive precipitates (Gi, G 2 , G 3 , G 4 , G 5 ), 

 Gi, G 3 , and G 5 were used for the determination of melting- 

 point; G x and G 3 were crystallized twice from naphtha and 

 thrice from alcohol, animal charcoal being present at the last 

 operation; G 5 was crystallized twice from naphtha, and twice 

 from alcohol in presence of animal charcoal. 



The hydrochloric solution of dibromaniline already men- 

 tioned sometimes shows supersaturation. 







T 



ABLE 



IX. 













B. 



A. 



O. 



F . 



G 5 . 



G, 



G 3 . 



G, 





7891 



78-88 



78-74 



78-82 



78-84 



o 



78-68 



78-79 



78-92 





•94 



•91 



•85 



•85 



•73 



•73 



•79 



•85 





•88 



•85 



•85 



•66 



•73 



•71 



-79 



•92 





■83 



•80 



•71 



•82 



•79 



•79 



•76 1 81 





•88 



■91 



•93 



•79 



•7G 



•76 1 



•82 



•81 





•91 



•77 



•87 



•87 



•68 



•87 : 



•90 



•73 





•88 



•72 



•90 



•85 



•76 



•73 



•74 



•73 





•80 i 



•88 



•87 



•69 



•76 



•81 



•82 



•83 





•94 



•83 



■77 



•93 



•79 



•89 1 



•92 



•94 





•78 



•77 



•71 



•71 



•87 



•92 



•90 



•85 





•91 ! 



•69 



•85 



•71 



•71 



•84 



•82 



•79 





•78 j 



•83 



•90 



•90 



■81 



•84 



•74 



•85 





•91 



•77 



•82 



■87 



•87 





•92 



•79 





•78 



■91 



•77 



•90 



•81 





•82 



■92 



Mean 



78-87 



78 '82 



78-82 



78-81 



78-78 



78-80 



78-82 



78-84 



Probable error . . . 



•010 



•012 



013 



•015 



•010 



014 



•011 



•012 



Thermometer . . . 



2 



2 



2 



2 



2 



2 



2 



4 



5. Tribromaniline [see Monobromaniline'].— Sample A 

 was prepared from brominated phenylacetamide by distilling 

 the crude product of the action of alcoholic potash thereon 

 from strong aqueous hydric chloride, and adding water to the 

 distillate. 



Z was precipitated by water from some strongly hydro- 

 chloric washings, and crystallized four times from naphtha, 

 four times from alcohol. B was crystallized from a hot mix- 

 ture of ordinary aqueous hydric chloride diluted with two vols. 

 of water, and washed with the same liquid diluted with six 

 vols, of water. It was crystallized twice from naphtha and 

 twice from alcohol, animal charcoal being present. Q was 

 prepared by directly acting with bromine on aniline dissolved 



