MENTAL LIFE OF APES AND MONKEYS ~ 267 
he had for a time under observation, would use a hammer to 
drive nails with, string beads on a cord, select the proper 
key from a bunch and unlock a padlock, and strike a match, 
light a cigarette, and smoke it with an expression of serene 
contentment. Peter developed a remarkable expertness 
in riding a bicycle, a feat which he was accustomed to per- 
form during his public exhibitions. 
Mr. Belt tells of a Cebus he observed which would use a 
stick with which to draw objects toward him. One day 
some bird skins were placed, as was thought, far beyond his 
reach, but he took his swing and used it so as to bring the 
skins near enough to be seized. He also secured some 
jelly, which was set out to cool, in the same way. 
Miss Romanes in her account of the behavior of a Cebus, 
from which we have already quoted, states that “if a nut 
or any object he wishes to get hold of is beyond the reach of 
his chain, he puts out a stick to draw it toward him, or if that 
does not succeed, he stands upright and throws a shawl back 
over his head, holding it by the two corners so that it falls 
down his back; he throws it forward with all his strength, still 
holding on by the corners; thus it goes out far in front of him 
and covers the nut, which he then draws toward him by 
pulling in the shawl.” The same monkey when given a 
hammer to crack a nut with used it effectively for that 
purpose. We have the testimony of Cuvier to the effect 
that an orang would pull a chair from one end of the room 
to the other so that by standing upon it he could open a 
latch, but how the act was originally learned we are not 
informed. 
The use of sticks and stones by apes and monkeys has 
been described by several writers. Pechuel-Lésche, who has 
had excellent opportunities for observing baboons in their 
native habitat, has come to the conclusion that the accounts 
