384 Proceedings of Royal Society of Edinburgh. [sess. 
monary tissue expressed itself in an absence of any de-oxidative 
change of colour. Organs, such as brain and eye, in which, com- 
pared with kidney and liver, there must be a much less energetic 
metabolism, remained blue. 
These observations corroborate experiments of Ehrlich, in which 
alizarine-blue and metliylene-blue were injected, and found more or 
less bleached to cliromogens (“ Der Sauerstoffbedurfniss des 
organismus,” 1885). 
"When one reads the statement, “ the liver is the seat of vigor- 
ous oxidation,” that is the converse aspect of the subject ; it is the 
seat of great oxidation in so far as its own tissue is concerned, but 
of correspondingly great de-oxidation so far as the blood and 
materials in its lymph are concerned. 
