24 Proceedings of Royal Society of Edinburgh. [sess. 
the glycogen disappears from the liver there is an actual increase 
in the liver fats. That this is not a transport of body fats to the 
liver is indicated by the fact that the blood serum remains clear, 
and that the melting-point of the liver fats does not fall, as would 
be expected if the body fats with their lower melting-point were 
added. It is, therefore, concluded that the fats are formed from 
the glycogen. 
3. Proteids . — The evidence of the production of fats from pro- 
teids is considered. The evidence of the proteids of the food being 
a source of fat in the liver is investigated. The evidence opposes 
the view that liver fats are formed from proteids. 
