11 
in Sclmlz's work. He found that blood treated 
with a little eucalyptus oil becomes quite dark 
and coagulates, as is the case with oil of turpen- 
tine. Schlaeger^ noticed that the blood of 
animals treated with eucalyptus oil shewed hardly 
any difference in coloi*, whether venous or arterial. 
By the great tendency of this oil to attract 
oxygen it must be clear that its presence deprives 
the red corpuscles of the means to re-absorb 
oxygen. 
Mees, and subsequently Binz, have shewn that 
an addition of one part eucalyptus oil to fifteen 
hundred parts of blood annihilates after fifteen 
minutes the contractility of the white corpuscles, 
while the same effect takes place at once with an 
addition of one in 1,000. In this respect the 
action is the same as with quinine : warmth does 
not restore the vitality of the blood-cells. 
The behaviour of the spleen under the influence 
of eucalyptus comes under consideration in the 
fifth chapter. The observation of the effect 
produced by quinine in reducing the volume of 
the spleen induced Hosier to search for a paral- 
lelism in this respect with eucalyptus, though not 
the oil. This anticipation was completely verified. 
In experimenting with dogs the hypodermic 
injection of 150 grains of extract of eucalyptus 
leaves free of alcohol was applied. After two 
injections, and in the space of five hours, the 
Inaugural dissertation, Goettingen, 1874. 
