MENTAL LIFE OF APES AND MONKEYS _ 269 
over his head before projecting the missile, standing erect 
the while.” At a later period Miss Romanes says of him: 
“When he throws things at people now he first runs up the 
bars of the clothes-horse; he seems to have found out that 
people do not care much for having things thrown at their 
feet, and he is not strong enough to throw such heavy objects 
as a poker or a hammer at peoples’ heads; he therefore 
mounts to a level with his enemy’s head, and thus succeeds 
in sending his missile to a greater height and also to a greater 
distance.”” Darwin states in his “Descent of Man:” “As 
I have repeatedly seen, a chimpanzee will throw any object 
at hand at a person who offends him.” And other well 
attested observations could be quoted to the same effect. 
Despite the contention of Wasmann we must admit, I 
think, that the use of objects by apes as weapons of attack 
rests upon a fair basis of testimony. 
A certain degree of foresight seemed to be manifested 
by Miss Romanes’ monkey in the way in which he disen- 
tangled his chain when it became wound around a clothes 
horse which was given him to run upon. “He looks at it 
intently and pulls it with his fingers this way and that, and 
when he sees how the turns are taken, he deliberately goes 
round and round the bars, first this way, then that, until 
the chain is quite disentangled. He often carries his 
chain grasped in his tail and held high over his back to keep 
it from getting in the way of his feet.” 
Mr. Hobhouse’s Jimmy was not so circumspect. “He 
would, however, as a rule, undo a single twist by retracing 
his steps, and sometimes would undo a more complicated one 
by a developed form of the method of trial and error, which 
consisted in this: that each time he felt the cord shortening 
on him, he would go back the way he had come.” This 
method was usually effective, but Jimmy showed little 
