Destructive Distillation of Animal Buhsimces. 4)59 



3*113 grs. gave 2'32 grs. of chloride of silver. ., . , . . 



7-684 ... gave 4-090 grs. mercury. *'^7 ^^ '*^f ^ ^7?^' 



^ySfi-r KU'l'j?5(k to 5?^eriment. bgriiBtdolO' Calculation;! OBicd 9fii 



Carbon. J£/?t S2-14 22*05 C^^ 84 



Hydrogen^' . ' 2*6^^^ l,, .miiu^'Mui// ;M? j^ioij^oini 



Nitrogen ...-r. .,,.„..-, 3*69!-'.....'!N,f ^ •,^-,,i^.».,-fi 



' Chlorine . . 18-43 ' 18-64 CP 71 ^ 



%^^i>vm\ 4dt to >fpq •rftfl'fr;?> '^rli ni lOO'OO 380 ^ 



On another occasion results were obtained more nearly cor-r 

 responding with the formula 3Hg Cl + C^"* H^ N; and inter- 

 mediate results were also obtained, but as the existence of these 

 different compounds appeared to me to be fatal to their employ- 

 ment as a means of purifying the base, I did not attempt to 

 pursue the subject further. The separation of lutidine from the 

 other bases was also attempted by forming other salts, but none 

 were found to answer, all being highly soluble except the carba- 

 zotate, which crystallizes in beautiful, long, yellow needles, a 

 property which, however, is unfortunately possessed by the car- 

 bazotates of all the otlier bases. 



Erom all these experiments, it appears that I have been able 

 to substantiate the existence of two bases, pyridine and lutidine, 

 although it has been as yet impossible to obtain the bases them- 

 selves in a state of satisfactory purity. I am inclined, however, 

 to think that the platinum salts, from their greater stability, and 

 the ease and regularity with which they crystallize, will aiford 

 means of purification, but I have been hitherto deterred from 

 trying this method on the large scale by the enormous, q^^ai^tity 

 of platinum which would be requisite for the purpose. i/.,|t p,'^(u>i\ 

 It appears, then, that DippeVs oil contains two series of bases, 

 one that is homologous with ammonia, the other a series peculiar 

 to that oil, homologous with one another, and remarkable for 

 their isomerism with the series of which aniline is the type. 

 Thus we have— ^^ luiioaltJ in o^JsmildiJg ^/igcnoo to aoltuloi 



Pyridine. . . . C^^H^N ' .o b ^onibiiiff to ffoilj/Io-i 

 Picoline . . . . C^Ml^N . oJ a^oUfri:.Ain^^.«^'irur 

 Lutidine. . . . C^^ H^ N .^lo'^gi; Toluidine. l^ 



And it is probable that the series existirig'iA jDippeFs oil does 

 not cease here, as I have found that the bases, with higher boil- 

 ing-points, give a steadily decreasing per-centage of platinum. 

 It is impossible, in the present state of the investigation, to give 

 any opinion as to the intimate constitution and relations of these 

 two groups of what I may call isohomologous bases. The most 



