36 JouRNAL OF COMPARATIVE NEUROLOGY. 
TABLE XI. (From RAveENEL). 
Number. _ Total Length. 
3 Boy of 2 years 245 mm. 
4 Boy of 5 years 300 mm. 
5 Girl of 9 years 280 mm. 
From this comparison it appears that the cord here chosen 
is short, the child evidently being under size even for a female. 
However, the length 212.95 mm., is well within the probable 
limits of normal variability as judged from the variations in the 
length of the spinal cord in the adult. In using the curve, 
however, it must be remembered that in this case, the lengths 
of the segments are from a female cord that is probably short 
even for this age and sex. This is all that need be said about 
the baseline of curve E. Since the measurements for the areas 
of the sections of the cord were so similar from the first to the 
fifth year, it was thought best to choose those made on the two- 
year old child (Table VI). This record of STILLING was taken be- 
cause the measurements for all the areas are given, and because 
it is the middle one of the series of three, and hence we know 
the form and size of the cord before and after this period. 
On examining curve E in chart I, it will be noted that the 
intervals on the axis of ordinates ave egual to and have the same 
value, as in all the other curves in this chart. 
Special emphasis is to be placed on this point, and atten- 
tention is particularly directed to it, since the designating num- 
bers are smaller in size than those used for the other curves, in 
which a number is given for each twenty units only. These 
peculiarities create the illusion that the intervals on the axis of 
ordinates in curve E are smaller than in the case of the other 
curves, and for this reason, attention has been called to this 
point. 
On comparing curve E with the composite curve in chart 
I, some interesting differences appear. If the composite curve 
be taken as the standard, the following statements may be 
made. The base line, or length of cord, in E is a little less 
than half aslong. The total area (called entire section in chart) 
at no point rises above 60 sq.mm., whereas in the composite 
