etching; ink, paper, dampness, etc., must be exactly right, and furthermore, you have this handicap—you cannot regulate the pressure. This is, of course, strictly a Zoo method. All attempts to secure black prints from wild animals have been total failures. The paper, the smell of paint, etc., are enough to keep the wild things away.
In the Zoo we spread the black pad and the white paper in a narrow, temporary lane, and one by one drove, or tried to drive, the captives over them, securing a series of tracks that are life-size, properly spaced, absolutely authentic, and capable of yielding more facts as the observer learns more about the subject.
As related here, all this sounds quite easy. But no one has any idea how cross, crooked, and contrary a creature can be, until he wishes it to repeat for him some ordinary things that it has hitherto done hourly. Some of them balked at the paint, some at the paper, some made a leap to clear all, and thereby wrecked the entire apparatus. Some would begin very well, but rush back when half-way over, so as to destroy the print already made, and in most cases the calmest, steadiest, tamest of beasts became utterly wild, erratic, and unmanageable when approached with tracklogical intent.
Trying It on the Cat
Even domestic animals are difficult. A tame cat that was highly trained to do anything a cat could do, was selected as promising for a black track study, and her owner's two boys volunteered to get all the cat tracks I needed. They put down a long roll of paper in a hall, painted pussy's feet black, and proceeded to chase her up and down. Her docility banished under the strain. She raced madly about, leaving long, useless splashes of black; then, leaping to a fanlight, she escaped up stairs to take refuge among the snowy draperies. After which the boys' troubles began.
Drawing Is Mostly Used
These, however, are mere by-accidents and illustrate the many practical difficulties. After these had been conquered with patience and ingenuity, there could be no doubt of the value of the prints. They are the best of records for size, spacing, and detail, but fail in giving incidents of wild life, or the landscape surroundings. The drawings, as already seen, are best for a long series and for faint features; in fact, the
