DonaLpson, Law of lnnervation. 239 
TABLE XVI. 
Data from specimen of R. virescens. Body-weight 51 grms. Ob- 
servations by Dr. DUNN not previously published. The section 
at S; of the left leg was unfortunately too imperfect to be counted. 
Frog C II. . Right Leg 
Number of Fibers 
Locality Observed Calculated Splitting Fibers 
f Cutaneous = C 
oe \ Muscular = M 
1301 C 
an lees Si 
OMIM Aye eos ty 0M) Oe ee te MUNG hy reece 
Sy S338 a ———— ee 
a eee eee 2a OZ yw eee! Bo ee eee Sh tt Ue ee 
Left Leg 
- = 1323,€ 
See { vals S Si (section lost) soa2n— es einem 
S, Bg800 ieeecoeaeyne a ienoamoe 1) AM RE one 
IPR te Jes ahavel, Wi Aad, ikolsso) (= SER eke eet 
To illustrate the use of the data in the foregoing tables, 
we will take the right leg of Frog B II (Table XIV), and 
determine how far the observed numbers there given agree with 
those estimated by the aid of my own formula. Table XIV 
shows 7107 fibers entering the leg. When the proportional 
numbers are calculated according to the formula (Table X), we 
obtain the following: 
TABLE XVII. 
Entering right leg of Frog B II— 7107 fibers 
To thigh— 46.0%= 3269 fibers 
To shank— 25-3%= 1796 fibers 
To foot— 28.7%= 2042 fibers 
The above numbers of fibers are the numbers of single 
pathways between cach segment of the leg and the entering nerve. 
When the observed numbers of fibers to the several seg- 
ments of the leg (see Table XIV) are compared with those 
here estimated, we obtain the following: 
