480 MORBID PRODUCTS. 



These analyses correspond with the formula C 46 H 36 N 6 O 13 ; 

 hence tubercle in this case may be regarded as protein from 

 which two atoms of carbon and one of oxygen have been re- 

 moved. 



In this instance, the surface of the liver was coated with 

 a layer of plastic exudation a line and a half thick. This 

 was separated and analysed in the same manner as the tuber- 

 cular matter. It contained : 



Water 



Solid constituents 

 Fat 



Water-extract with pyin and casein 

 Spirit-extract 

 Salts 



Insoluble organic residue 

 Containing Carbon 



Hydrogen 



Nitrogen 



Oxygen 



731-62 

 268-38 



15-47 



4-32 



6-23 



5-40 



237-96 



55-190 

 7-186 



16-602 



21-022 



This substance is consequently identical in its ultimate com- 

 position with the tubercular matter found in the abdomen. 

 Tubercular matter from the brain yielded,, after purification : 



Carbon . . 54-4 10-> 



Hydrogen . . 7*147 I which corresponds with the 



Nitrogen . . 16-366 [ formula C 46 H 37 N 6 O u 



Oxygen . . 22-07 7 J 



That is to say, two atoms of carbon less, and one atom of 

 hydrogen more than occurs in protein. 



If in this and the preceding analyses the formulse for the 

 morbid deposits are calculated in relation to C 48 , their connexion 

 with the formula for protein will be more obvious to the eye. 

 We shall have : 



2 At. of tubercular matter from the lungs . = 2Pr-r-NH 3 + 2HO-j-H 



2 At. of tubercular matter from the liver . = 2Pr -f NH 3 -f- H 



2 At. of tubercular matter from the abdomen = 2Pr + NH 3 



4 At. of cerebral tubercle . . = 4 Pr -f|NH 3 + 4 HO + 3 H 



Scherer has adopted a similar course of research with other 

 morbid products. 



A scrofulous mass found in the abdomen of a child who died 

 from general scrofula, was, after extraction with water, alcohol, 



