vn.1 DISCUSSION OF THE DATA OF STATURE. 107
contrived more than one form of apparatus by which the probable stature of the children of known parents can be mechanically reckoned. Fig. 12 is a representation of one of them, that is worked with pulleys and weights. A, B, and C are three thin wheels with grooves round their edges. They are screwed together so as to form a single piece that turns easily on its axis. The weights M and F are attached to either end of a thread that passes over the movable pulley D. The pulley itself hangs
from a thread which is wrapped HCIOHT D
IN MCHEM
two or three times round the MALE FEMALE MALE
groove of B and is then secured 0 0 =
z
to the wheel. The weight SD -1 A n
FIG .12.
TO FORECAST STATURE
oer'~Fvl
hangs from a thread that is 75- - 70 - -75
wrapped two or three times round
the groove of A, and is then
7J
secured to the wheel. The diameter of A is to that of B as 2
MB
to 3. Lastly, a thread is wrapped 69- -- 60 - 65
in the opposite direction round
the wheel C, which may have so- -so
- ss -
any convenient diameter, and is
attached to a counterpoise. M refers to the male statures,
F to the female ones, S to the Sons, D to the Daughters.
The scale of Female Statures differs from that of the
Males, each Female height being laid down in the
position which would be occupied by its male equivalent.
W
G
111
