1886. ] Psychology. 189 
dog recognize them by scent. They were all alike, and all con- 
tinually handled by us. Still I did not trust to that alone, but had 
a number printed for each word. When for instance, he brought 
a card with “food” on it, we did not put down the same identical 
card, but another bearing the same word ; when he had brought 
that a third, then a fourth, and soon. For a single meal, there- 
fore, eighteen or twenty cards would be used, so that he evidently 
is not guided by scent. Noone who has seen him look down a 
row of cards and pick up the one he wanted could, I think, doubt 
that in bringing a card he feels he is making a request, and that 
he can not only distinguish one card from another, but also asso- 
ciate the word and the object. This is, of course, only a begin- 
Still, in such a case, one ought not to wish for one result more 
an another, as of course the object of all such experiments 1$ 
