That the turkey-hen can count, the following instance occurring under my own observation would seem to indicate. The bird had a nest in my garden in which she had deposited three eggs. One day another turkey, seized with a desire of ovipositing, spied this nest and laid an egg therein. The original owner of the nest came along soon after the interloper had left her egg; she examined the nest carefully, and turned the eggs with her beak. Finally she thrust her beak through the shell of an egg and bore it far from the nest before dropping it on the ground. Now, as far as I could tell, the eggs were alike, but the sharper and more discriminating eyes of the turkey undoubtedly saw, on close examination, some peculiarity in color or shape in the stranger's egg, and therefore bore it away and destroyed it. I believe, however, that her attention was arrested at first by the unexpected number of eggs in the nest, and that she was enabled to detect the stranger's egg only after much inspection and comparison. Many animals have been taught to count, but none of them show that they fully appreciate the value of numerical rotation. Of course, in the vast majority of trained animals, the seeming appreciation is only a trick founded on the sense of smell, sight, touch, or taste. An instance recently came under my personal observation in which a dog, a high-bred collie, seemingly evinced an abstract idea of numbers. The animal in question received an injury a year or so ago through which she became permanently and totally blind. Recently she gave birth to a litter of six puppies, all of which were uniform in size and markings. Immediately after the birth of the puppies, the dog's owner had mother and young removed from the dark cellar in which they then were, and carried to a warm and well-ventilated room in his stables. In the darkness of the cellar one of the puppies was overlooked and left behind. As soon as the mother entered the box in which her young had been placed, she proceeded to examine them, nosing them about and licking them. Suddenly she appeared to become very much disturbed about something; she jumped out of the box and then jumped back again, nosing the puppies as before. Again she jumped from the box and then made her way toward the cellar, followed by her astonished owner, who had begun to have an inkling as to what disturbed her. She had counted her young ones, and had discovered that one had been left behind. Sure enough, the abandoned puppy was soon found and carried in triumph to the new home. So astonished was the gentleman[87] at this blind creature's intelligence that he resolved to experiment further; he removed another puppy and walked away with it in his arms. It was not long before the blind mother showed her distress so plainly, that I begged him to return the puppy, which, having been returned to her, she caressed for a moment or so, and then gave herself up to the chief function of maternity, suckling her young.