tion; yet as he faced the man within he felt a momentary surprise. For at first he could see in Kanlan only a portly, quiet man, carelessly dressed in clothes a knowing tailor had cut. But as his eyes saw clearer he perceived that the portliness was not of flesh but of huge muscles, thinly coated with fat, that the plump, olive-skinned cheeks concealed a square, fighting jaw, and that his quiet was the loll of the successful, city-bred animal, bound by no laws but his own—but an animal powerful enough to prefer to fight fair. His heavy lids lifted to watch listlessly as Trant opened his suit case and took out the instruments for the test.
The galvanometer consisted merely of a little dial with a needle arranged to register on a scale an electric current down to hundredths of a milliampère. Trant attached two wires to the binding posts of the instrument, the circuit including a single cell battery. Each wire connected with a simple steel cylinder electrode. With one held in each hand, and the palms of the hands slightly dampened to perfect the contact, a light current passed through the body and swung the delicate needle over the scale to register the change in the current. Walker, and even Captain Crowley, saw more clearly now how, if it was a fact that moisture must come from the glands in the palm of the hand under emotion, the changes in the amount of the current passing through the person holding the electrodes must register upon the dial, and the subject be unable to conceal his emotional change when confronted with guilty objects. Kanlan, comprehending nothing, but assured
