In one room I came upon a young man who was in charge of a machine for the manufacture of liquid air. This product is packed in vacuum cans and shipped to all parts of the world. I had never seen it before. It is strange stuff, having a temperature of 300 degrees below zero. The young man took a little of it in his hand (it looked like a small pill made of water), and, after holding it for an instant, threw it on the floor, where it evaporated instantly. He then took some in his mouth and blew it out in the form of a frosty smoke. He was an engaging young man, and seemed to enjoy immensely doing tricks with liquid air. In the department of entomology there is also great activity. Professor S. J. Hunter has, among other researches, been conducting for the last three years elaborate experiments designed to prove or disprove the Sambon theory with regard to pellagra. "Pellagra," Professor Hunter explained to me, "has been known in Italy since 1782, but has existed in the United States for less than thirty years, although it is now found in nearly half our States and has become most serious in the South. Its cause, character, and cure are unknown, although there are several theories. One theory is that it is caused by poisoning due to the excessive use of corn products; another attributes it to cottonseed products; and the Sambon theory, dating from 1910, attributes it to the sand fly, the theory being that the fly becomes infected through sucking the blood of a victim of pellagra, and then communicates the infection by biting other persons. In order to ascertain the truth or untruth of this contention, we have bred uncontaminated sand flies, and after having allowed them to bite infected persons, have let them bite monkeys. The result of these experiments is not yet complete. One monkey is, however, sick, at this time, and his symptoms are not unlike certain symptoms of pellagra." The university's Museum of Natural History contains the largest single panoramic display of stuffed animals in the world. This exhibition is contained in one enormous case running around an extensive room, and shows, in suitable landscape settings, American animals from Alaska to the tropics. The collection is valued at $300,000, and was made, almost entirely, by members of the faculty and students. The Department of Physical Education is in charge of Dr. James Naismith, who can teach a man to swim in thirty minutes, and who is famous as the inventor of the game of basketball. Dr. Naismith devised basketball as a winter substitute for football, and gave the game its name because, originally, he used peach baskets as his goals.