4O ANIMAL CHEMISTKY LECTUKE II. 



bodies composed of more than two ultimate residues, I shall 

 assume, with greater or less warrant, that we can ascertain the 

 mode in which the residues are successively appended to one 

 another, as in the second list of bodies which I shall presently 

 bring under your notice. 



(40.) The compounds whose names are written up in the third 

 column of the two following tables occur either as natural pro- 

 ducts of the animal body, or as constituent residues of such 

 natural products. In the first and second columns are given 

 the names of the simpler molecules, by the mutual combination 

 of which, with elimination of water, the corresponding bodies 

 named in the third column are produced. I think I may venture 

 to say that in every instance the bodies in this column have 

 been proved to consist of the residues which they are here re- 

 presented to contain, although, as I have said, in those bodies 

 which are composed of more than two ultimate residues, the 

 order in which the residues are successively combined, or the 

 relation in which any two of them stand to the remainder, may 

 be to some extent a matter of assumption. The word ' acid ' is 

 omitted from the columns for the sake of space : 



Kesiduea Diamerones 



Alcohol Sulphuric Isethionic 



Wood-spirit Ammonia Methylamine 



Carbonic Ammonia Urea 



Glycolic Ammonia Glycocine 



Leucic Ammonia Leucine 



Palmitic Cetal Spermaceti 



Palmitic Melyssal Myricin 



Palmitic Glycerin Palmitin 



Stearic Glycerin Stearin 



Oleic Glycerin Olein 



(41.) The first of these bodies, namely, isethionic acid, is 

 a constituent of taurine, and is formed by the union of alcohol 

 and sulphuric acid with elimination of water, or, in other words, 

 it contains a residue of each of these two bodies. Next on the 

 list is methylainine, a frequent product of the putrefactive 



