Dr. E. J. Mills's Researches on Melting-point. 17 



result of a further crystallization from spirit under the second 

 E column: and so on. 



Table XV. 





F, 



*i- 



Fi- 



*V 



F 2 . 



E. 



E. 



E. 



E. K 





78-88 



78-86 



78-89 



78-78 



78-85 



78-79 



78-83 



78-76 



78-88 78 



87 





•91 



•91 



•79 



•88 



•85 



•76 



•81 



•86 



•78 



95 





79-05 



•81 



•87 



•80 



•83 



•81 



•86 



■73 



•80 



95 





78-78 



•86 



•94 



•88 



•93 



•86 



•89 



•62 



•70 



90 





■81 



•73 



•89 



•88 



•80 



•83 



•83 



•78 



•88 



90 





•81 



•78 



•84 



•90 



•87 



•89 



■89 



•78 



•82 



95 





•78 



•78 



■78 



•93 



•93 



•65 



•76 



•78- 



•85 



84 





•81 



•84 



•84 



•93 



•93 



•83 



•81 



•88 



•80 



90 





•81 



•73 



•86 



•80 



•92 



•89 



•86 



•78 



•82 



84 





•81 



■81 



•92 



•88 



•92 



•71 



•97 



•83 



•80 



78 





•78 



•81 



•83 



•93 



•83 



•86 

 7902 



•73 

 •91 



•78 

 •86 



•90 



•82 



84 



\Iean 



78-84 



78-81 



78-86 



78-87 



78-88 



78-82 



78-84 



78-78 



78-82 78 88 



i*robable error. 



•016 



•Oil 



•010 



•011 



•009 



•018 



■012 



•013 



•010 



Oil 



thermometer... 



2 



2 



3 



3 



3 



2 



2 



2 



2 



2 



F. Coal-tar toluol boiling at 109°-5-112°-0 was purified 

 with oil of vitriol in the cold ; it then boiled at 110°-113°. 

 Equal volumes (300 cub. cent.) of nitrate (sp. gr. 1'48) and 

 this substance were mixed, the latter being run in gradually. 

 51 cub. cent, of toluol were recovered by distillation ; hence 

 benzol was absent. The product was washed, added to 300 

 cub. cent, "fuming" nitrate (sp. gr. 1*5) ; washed, added to 

 4 vols, "fuming" nitrate (the latter), left 24 hours, and 

 1 vol. Nordhausen poured in — this being done in two opera- 

 tions, on account of the violent action in the cold. The yield 

 was 190*7 per cent.; theory, 246 - 7 per cent. Half of the 

 yield was crystallized from naphtha and spirit, and termed F x . 

 The other half was boiled for QxQ hours with "fuming" 

 nitrate, and termed F 2 ; the product was very dark, contained 

 scarcely any acid bodies, and showed little loss when weighed. 

 The fusion-points of F x and F 2 are the same. 



K. Prepared from liquid coal-tar nitrotoluol which had 

 been twice distilled, cooled to —17°, filtered, again distilled 

 (under 224°); when cooled as mentioned, only a trace of crys- 

 tals was deposited. 19 cub. cent, of this liquid, 150 cub. cent. 

 " fuming " nitrate, 100 cub. cent. Nordhausen, yielded 31*5 

 grm. trinitrotoluol, = 142'6 per cent., theory requiring 165*7 

 per cent. The product was crystallized four times from 



Phil. Mag. S. 5. Vol. 14. No. 85. July 1882. C 



