30 JOURNAL OF COMPARATIVE NEUROLOGY. 
STILLING a series of measurements of the areas of the gray and 
white substance at the level of the several segments of three 
immature spinal cords: from a child at one year, from one at 
two years, and from one at five years. STILLING’s tables con- 
taining these records are found on pages IIOI, 1102, 339 and 
343 of his ‘‘Neue Untersuchungen tiber den Bau des Riucken- 
markes.”” 1859. 
In the following Table (VI) which contains ST1LLiNne’s mea- 
surements, it is at once seen that certain segments in the five- 
year old child were not measured. In order to make this table 
comparable with the others, an interpolation for the missing 
records, C I and C II and LI and LII, has been made on the 
assumption that in the five year old cord the areas of the un- 
measured segments would form the same fraction of the sum of 
all the areas that they do in the one and two year old cord. 
At the foot of the five year old columns in Table VI, the total 
given is the one obtained after the above interpolation. More- 
over, it will be noted that in this cord identical measurements 
are given for the thoracic segments T.III-VIII and T.IX-XI. 
Individual measurements for these several segments would, 
of course, have been preferable, but there is no reason to sus- 
pect that any serious error has resulted from the method here 
employed by STILLING. 
