256 
GEOFFREY SMITH. 
This table brings out unmistakably the remarkable result 
that the blood containing the yellow lipochrome not only 
yields on the average nearly four times as much fatty material 
as the colourless blood, but also more than twice as much as 
the blood containing the pink lipochrome. 
This result was wholly unexpected, as the pink blood used 
for the estimation was deeper in colour than the yellow, 
owdng to the fact that during September when the estimations 
w r ere made, the females were only beginning to ripen their 
ovaries, so that the blood w 7 as generally of only a pale 
yellow. 
There can be no doubt that if a large quantity of deep 
yellow blood were subjected to the analysis, a still higher 
percentage, up to *5 per cent., would be readily obtained. But 
the results as they stand indicate the remarkable fact that 
the pink lipochrome stand s for a lower fat-equiva- 
lent than the yellow. We are therefore in a position to 
say that the blood of the female at the time of the 
ripening of the ovary contains at any rate more 
than twice as much fatty material as the blood of 
the male, even when the latter is mobilising its 
fat to the greatest extent. 
We have stated that the pink lipochrome is characteristic 
of the blood of the male, while the yellow is characteristic of 
that of the female. This is roughly true if we confine our- 
selves to mere inspection, though an intermediate orange tint 
is met with in both males and females. The saponification and 
extraction method which we have explained throws a deeper 
light into the question of the degree of admixture of the 
two lipochromes. It is found that the ether petroleum which 
has been shaken up with the treated blood of any of the 
three kinds, i.e. non-pigmented, pink or yellow, on evapora- 
tion invariably shows the presence of the golden yellow lipo- 
chrome, in very small quantities in the non-pigmented blood, in 
rather greater quantity in the pink blood, and in much greater 
quantity in the yellow blood. From the pink blood a 
relatively small amount of pink lipochrome appears in the 
