214 JOURNAL OF COMPARATIVE NEUROLOGY. 
results is not so easily found; but is probably partly due to the 
fact that his results represent an estimate and not an enumera- 
tion. It is also highly probable that the osmic acid did not in 
the material used by him bring out all the smallest fibers suffi- 
ciently well to be included. | 
In order to determine the value of the calculations for the 
innervation of the skin about to be given, it will be well to 
consider in detail the methods by which the data for these 
calculations were obtained. 
III. DETERMINATION OF THE AREA OF THE DERMAL SuR- 
FACE OF THE Human Bopy. 
I. Krause’s Determination. Krause (1844) determined 
the dermal surface of the body to be 1,584,300 mm*. or about 
15 square feet. I can find no record of his method, nor any 
description of the subject used. : 
2. unke’s Determination. In making his determination 
of the area of the dermal surface FUNKE (1858) covered the 
half of a cadaver with gummed paper cut into one inch squares, 
as well as into smaller pieces, the values of which were deter- 
mined beforehand. In so doing care was exercised to cover 
every part of the skin, to allow no overlapping of the paper, 
and to guard against the folding of either the paper or the skin. 
The results obtained he considers accurate within a square inch. 
He thus determined the areas separately for each part of the 
body, and gives as the entire area 1,651,700 mm”. 
3. Fubinit and Ronchi’s Determination. These investiga- 
tors (1881) divided the surface of the body into its anatomical 
regions and marked these by sharp lines. These regions were 
‘then divided into such geometrical figures as could easily be 
measured. For the head a craniometer was employed. The 
measurements were made on the cadaver of a man 1.62 meters 
in height, and 50 kg. in weight. They determined the areas 
for the different parts separately and found the entire area to be 
1,606,685 mm’. 
4. Meeh’s Deiermination. Mee (1879) combined in his 
method several valuable features. "On large even surfaces he 
