908 ANIMAL INTELLIGENCE 
2nd day.—The irritating substances used on the first 
day produce more marked effects. 
No positive evidence is forthcoming as regards milk, 
but sugar seems to be agreeable. 
When salt is put in the mouth it is rejected doubt- 
fully, but aloes, most decidedly. Both are used in 
solution. 
5th day.—lIrritants affect the puppies through the 
nose at a greater distance. 
It remains doubtful whether meat is smelt or not, 
but milk anda solution of aloes seem to be, for the 
puppies cease to make their characteristic sounds when 
these substances are placed before the nose. 
They do not yet seem to show any shortening of the 
latent period of reflex action on pinching. 
9th day.—None of them show any signs of opening 
of the eyes. 
10th day.—When blistering fluid in a bottle is 
brought near, active movements result; the head is 
lifted up, the tongue put out, and sneezing, etc., follows. 
Now, when a solution of salt of the same strength as 
that used before is presented, it is rejected, and there is 
frothing at the mouth, etc. Much disgust is also shown 
towards aloes; with milk the result is not pronounced, 
but with sugar there is undoubted enjoyment. 
Hyes begin to open. 
19th day—On clapping my hands, and uttering 
“Hist !” vigorously, the eas are moved, indicating the 
ability to hear. 
20th day.—Evidence of hearing, as above, at the 
distance of 4 feet. 
A piece of meat, put within a }-inch of the nose 
of one of the puppies, causes it to move towards the 
object and lick the lips. The same follows when 
cheese is used. When the same experiments are tried 
with sleeping puppies they also lick the lips. 
