418 General Notes. [April, 
trical current. One electrode was fixed to the skin by a broad 
moistened contact, while the other electrode, used in exploring 
the surface, ended in a fine metal point. By graduating the 
strength of the current, sensory irritation was confined to the 
region of the pointed electrode. It was found that electrical 
stimulation of different areas of the skin produced different sen- 
sations. At one spot the irritation excited only pain, at another 
a sense of cold, at a third of warmth, at a fourth, it might be, of 
pressure. Hence, it may be concluded, that the quality of the 
sensation depends not on the nature of the stimulus but upon 
the specific energy of the irritated nervous apparatus. 
The author thinks he has shown that sensations of cold 
and warmth, respectively, are excited through different sets of 
nerves. The co/d nerves are broadly scattered over the skin and 
their endings are rather deeply buried in its substance. The 
w 
which alone we attain sensations of heat. A cold piece of metal, 
a square centimeter in section, laid upon a certain part of the fore- 
arm, produces no sensation of cold, while a pointed instrument of 
the same metal, at the same temperature, with a contact surface 
of only half a square millimeter, gives intensely cold sensations 
when applied to certain parts of the skin in the immediate neigh- 
borhood of the insensitive area —Zeitsch. f. Biologie, Bd. xx, p. 141: 
PSYCHOLOGY. 
INTELLIGENCE OF A SETTER Doc (Continued).—It is perhaps 
proper for me to here refer to the peculiar fancy of the bitch 
Frank. Barney was always her choice and strange as it may seem 
—with him there was no reciprocation. 
I have tested her pretty thoroughly, and I can say that she has 
not thus far permitted a dog not her own color to line her. And 
as a further proof a short time ago, being a few days before her 
season of heat, she left the farm seven miles distant upon which I 
had her kept and returned here. 
There are numbers of dogs in the neighborhood where she was 
kept, but she returned and when a dog of different color from her 
own was offered she would fight desperately. Although kept on 
the farm for several months this was the only time she had left it. 
Experimenting as I have with a number of dogs and bitches, I 
have noticed that some are very choice in their selection of a 
mate, while others are not. Some bitches will permit several to 
ne them, even without interval, while others will not have but 
one serve m. would not serve a wolf, Canis latræs, 
but Wad did. As a further evidence for comparison, showing the 
difference between the likes and dislikes of dogs, I give the 
following : Frank, as above stated, chooses a mate only of her 
