“True! Well, I shall endeavor to create the emotion as I wish it.” The professor laughed aloud. “I think under such conditions that the emotion would be altogether too tame to have a visible effect on the brain.” Christopher resented the laughter: “Perhaps you are not willing to assist me in making my experiments?” he questioned angrily. “Oh, yes; perfectly willing,” was the smiling answer. “Now, look here! I wish to investigate this carefully, and I’m willing and able to pay your price; but I’ll not be ridiculed sir, I’m no boy, I’ll have you understand!” “No, of course not,” answered the professor soothingly, he thought him a mild lunatic; really he seemed half insane; no matter what reply the professor made, he grew more wroth, until he, out of all patience, said angrily: “What is the matter with you? You act like a maniac!” “Quick! Quick! Photograph me!” cried Christopher, with livid lips. “Well, well!” exclaimed the professor in astonishment, as he hastily complied with the request; after which Christopher sank back, pale and trembling. The professor looked at him admiringly: “How did you accomplish it?” “Oh, I don’t know; I just let go of the strings;” smiling faintly. Thus he went through the whole scale of emotions; he was taken while under the influence of anæsthetics; in a placid mood; in a moment of most uproarious hilarity; in the depths of despondency; in languishing amorousness; in fact, in all conceivable moods of the human mind. He seemed to possess the strange faculty of producing any desired emotion at will. After he had exhausted all moods, he one day stood gazing meditatively, and rather sadly at the plates. “Are you not satisfied?” asked the professor. Christopher sighed deeply: “No, I cannot say that I am; it is certainly shown that there is a change, the exact nature of which is by no means clearly defined. Some future discovery will, I am sure, enable the scientist to see the action of the brain as plainly as we now know the action of the heart.” He nervously ran his fingers through his hair while speaking; he withdrew his hand with an exclamation of horror: it was covered with hairs and a cloud of the same enveloped him. “Heaven! Is all my hair falling out?” he cried in dismay. The professor calmly observed: “I have noticed it for some time; when you first came your mustache and eyebrows were very thick and long, but have been gradually thinning, I thought several times that I would speak of it, but we have had so much else to talk about, and the most of your moods have been so peculiar—” he smiled as he paused. “Oh, it’s all right for you to laugh! You wouldn’t if you were in my shoes! Whatever will Maria say?”