M. Greenwood 
67 
(c) That there are quite sensible correlations between the weight of the heart 
and that of the other organs. 
3. The "Normal" Heart. 
Let us now consider the " normal " heart. Evidently the ideal normal heart is 
hardly at present capable of measurement with respect to any character other 
than those related to its manner of performing its functions. Such an organ ought 
really to be measured during the life of its owner, and we cannot do this, as we 
are unacquainted with the exact relation subsisting between body weight and 
heart weight in the living subject. The following is, perhaps, the best approxi- 
mation to the truth that we are in a position to make. Correlation tables have 
been constructed for pairs of organs found to be healthy post-mortem. In any 
case in which I had the least reason to suspect the existence of disease, the 
measurements have been excluded. 
The following results were reached : 
Healthy Organs. 
TABLE IV. Hearts with Livers. Number 358. 
Mean Heart 1 1 -04 ozs. Standard Deviation 1 -923 ozs. 
Mean Liver 60'44 ons. Standard Deviation 8'948 ozs. 
Correlation of Heart and Liver -2780+ -0329. 
TABLE V. Hearts with Spleens. Number 517. 
Mean Heart 11-25 ozs. Standard Deviation 2-073 ozs. 
Mean Spleen 5-22 ozs. Standard Deviation 1-996 ozs. 
Correlation of Heart and Spleen -2654 ±-0276. 
TABLE VL Hearts with Kidneys. Number 413. 
Mean Heart 1 1 -24 ozs. Standard Deviation 1 -946 ozs. 
Mean Kidney* 12-01 ozs. Standard Deviation 2-016 ozs. 
Correlation of Heart and Kidneys -4004 ±-0279. 
Drawing up a table of coefficients of variation as before we have : 
TABLE B. 
Relative Variability of Healthy Organs. 
Organ 
CoefBcient of Variation 
Hearts with Livers 
Hearts with Spleens 
Hearts with Kidneys ... 
Livers 
Spleens 
Kidneys 
17- 42) 
18- 42 > mean 17-71 
17-30) 
14-80 
38-21 
16-80 
* The mean value of the right kidney of 100 males 20 to 55 years of age, as deduced by Pearson from 
Eeid and Peacock's values, is 5-57 ozs. 
9—2 
