Mr. Spencer, who denies that the child spontaneously strikes the table which has wounded him, is not, however, unaware that a savage—the Indian Tupis, for example—if he has bruised his foot against a stone, leaps against it in fury and bites it like a dog. Mr. Spencer sees in such facts a phenomenon wholly physical, the need for spending one’s rage in violent muscular action; but this very need can but favour the birth of a psychological illusion, of which the tenacity will be proportionate to the intensity of the sentiment. The physical and the moral are too closely bound up together for a physical expression of anger not to be accompanied by a moral belief corresponding to the action; if a powerful instinct induces us to treat a stone as an enemy, we shall very really see an enemy in this stone. [Sidenote: Romanes’ experiments.] Mr. Romanes made some observations, of the same kind as those of Mr. Spencer, upon a very intelligent Skye terrier. This terrier, like many other dogs, was accustomed to play with dried bones, throwing them into the air and endowing them with an appearance of life, for the pleasure of chasing them afterward. Mr. Romanes attached a long slender thread to a dried bone which he gave the dog to play with. After he had played for some time Mr. Romanes chose an opportune moment, when the bone had fallen to the ground some distance away, and the terrier was approaching it; he drew the bone gently away, by means of the thread attached to it. The attitude of the terrier changed entirely. The bone, which he had been pretending to regard as living, appeared to him to be really so, and his surprise knew no bounds. He approached it nervously and cautiously, as Mr. Spencer describes in the observation which he made; but the slow motion of the bone continued, and the dog became more and more certain that the movement could not be explained as resulting from the impulsion which he had communicated; his surprise became terror, and he ran away and hid himself under the table, to study from a distance the disconcerting spectacle of dried bones coming to life again! [Sidenote: Soap-bubble experiment.]