FIBRES OF THE INTERNAL CAPSULE OF THE BONNET MONKEY. 
71 
Since these decimals were taken to two places, each capsule in every group becomes 
divided into a hundred parts, and if we drop the decimal point, we may regard the figure 
as a whole number, taking the whole capsule to be 100. For example, the movement 
of “protrusion of the tongue” was observed in Group II. to occur in two experiments, 
the length of the capsule being respectively in eacli case 12 mm. and 17 mm., the average 
therefore being 14 mm. The movement was observed to follow excitation of the first 
millimetre in each case, and to end at the third millimetre in the one case and at 
the fourth in the other. Consequently the movement began at i^-th and jl/th of the 
actual length of the respective capsules, and w^as last obtained at i^fhs and q^ths. 
On converting these fractions into decimals they become respectively '08 and 'OG 
for the anterior limit and '25 and '23 for the posterior limit, and on taking the 
averao’es of these we obtain '07 and '24. 
Now that we have the situations of the fibres expressed in terms of the average 
length of the capsules of each group, we need not keep the decimal point if we regard 
tbe capsule as divided into a hundred parts, and then take the figure as a whole 
number, so that in Table I. the limits of the representation of the protrusion of the 
tongue become 7 and 24, i.e., and 
This mode of treating the figures has this great advantage, that whatever tlie 
length of the different capsules may be in any group, we can compare the function of 
the fibres in similar parts. 
At the same time tins mode of extending the differentiation of the capsule has this 
disadvantage, viz., that, although taken absolutely, as is represented by the fraction 
we obtained the movement from the most anterior millimetre of the capsule, 
yet in converting jx into a decimal to two places, we necessarily obtain -jx = '07, 
and then, in regarding the capsule for purposes of relative comparison as divided into 
100 parts (dropping the decimal point), we thus obtain the figure 7, meaning the first 
seven-hundredths, as representing the first portion at which the movement occurred. 
In fact, in attempting to analyse and to compare the results of each experiment, 
i.e., the fractions, we found it impossible to employ the method of a common denomi¬ 
nator, and therefore selected, at Mr. Gotch’s suggestion, the two places of decimals. 
We were obliged to take twm places of decimals, since, as a glance at Table I.'“ 
shows, one place of decimals would not have given the differentiation we have dis¬ 
covered to exist, though at the saiiie time it was clear to us that two places would so 
extend our subdivisions of the caj^sule as to make it difficult to convey the absolute 
expression of the amount {i.e., extent) of representation. 
These averages are set out in the last column in Table I., in which the movements 
a,re also arranged in their order from before back. 
In Table I. the first column gives the names of the movements observed, and, as 
just stated, in the order in wdiich they occur from before back. The first column of 
figures denotes the distance from the anterior extremity of the capsule of the first 
* See p. 60. 
