APPEND IX.- -ANALYTICAL EVIDENCE. 



95 



4. TlitJES CONTAINING CnONDRINE. 



Scherer.*a 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxvgen 



Mulder. 



50-607 



6-578 



14-437 



28-378 



a Ann. der Chem. und Pharm., XL., 49. 



5. COMPOSITION OF THE MIDDLE MEMBRANE OP ARTERIES. 



Scherer.*a 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxygen 



53-750 



7-079 



15-360 



23-811 



n. 

 53-393 



6-973 

 15-360 

 24-274 



Calculated 

 C48H38N6016 



53-91 



6-96 



15-60 



23-53 



a Ann. der Chem. und Pharm., XL., 51, 

 6. COMPOSITION OP HORNY TISSUES. 



Scherer.*a 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxygen ? 

 Sulphur > 



Carbon 

 ^ Hydrogen 

 Nitrogen 

 Oxygen 

 Sulphur 



a Ann. der Chem. und Pharm., XL., 53. 



The composition of the membrane lining the interior of the shell of the egg approaches 

 closely to that of horn. According to Scherer, it contains 



Scherer.*a 



Carbon 50-674 



Hydrogen . . ... . . 6-608 



Nitrogen 16*761 



. 25-958 



a Ann. der Chem. und Pharm., XL., 60. 

 The composition of feathers is also nearly the same as that of horn. 



Scherer.*a 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxygen 



Beard of the 

 feather. 



. . 50-434 

 - . ' . 7-110 



. . 17-682 

 . . 24-774 

 a Ann. der Chem. und Pharm., XL., 61. 



Quill of the 

 feather. 



52-427 



7-213 



17-893 



22-467 



Calculated 

 C48H39N7O16. 



52-457 



6-958 



17-719 



22-866 



The analysis here given of the beard of feathers agrees closely with that of horn, while 

 that of the quill is more accurately represented by the attached formula, which differs 

 from *hat of horn by 1 eq. of oxygen only. 



7. COMPOSITION OP THE PIGMENTUM NIGRUM OCULI. 



Scherer.*et 



Carbon 

 Hydrogen 

 Nitrogen 

 Oxygen 



58-273 



5973 



13-768 



21-986 



58-673 



5-962 



13-768 



21-598 



57-908 



5-817 



13-768 



22-507 



a Ann. der Chem. und Pharm., XL., 63. 



