NATURAL RESISTANCE TO INFECTIOUS DISEASE AND ITS REINFORCEMENT.
DR. SIMON FLEXNER
COMMON observations early indicated that individuals of all animal species, and of the human species especially, were very unequally subject to disease. This elementary fact is impressed every day upon the thoughtful and has been, from the earliest times, the object of much ingenious speculation.
GYROSTATIC ACTION OF THE FLY-WHEEL OF THE AUTOMOBILE ENGINE
GYROSTATIC ACTION ON BOARD SHIP
GYROSTATIC ACTION OF A ROLLING DISK
GYROSTATIC ACTION OF THE BOOMERANG
THE DEVICE OF OTTO SCHLICK FOR THE PREVENTION OF ROLLING OF SHIPS AT SEA
THE BRENNAN MONORAIL CAR
CALCULATION OF TORQUE-REACTION DUE TO PRECESSION
PROFESSOR W. S. FRANKLIN
THE Brennan monorail car and the Schlick device for the prevention of rolling of ships at sea have recently attracted popular attention to the gyrostat, and gyrostatic action has recently become vitally interesting to a large group of men because an automobile-engine fly-wheel shows serious gyrostatic reactions when the automobile rounds a curve rapidly or rises suddenly upon a bump in the road.
JOSIAH WILLARD GIBBS AND HIS RELATION TO MODERN SCIENCE. III
FIELDING H. GARRISON
Catalysis, Colloids and Chemical Purity.—When chemical change can be produced in a system by the mere presence of small quantities of another substance which itself usually remains unchanged at the end of the process, such an effect is called catalysis and the agent employed a catalytic agent.
HAVE the dentists waked up? Some of them have. A new order of the “Knights of the Forceps” has been formed, called the “Orthodontists” (tooth straighteners). At last accounts there were sixty of them in America, as compared to 50,000 simple dentists.
THE ORIGIN OF THE NERVOUS SYSTEM AND ITS APPROPRIATION OF EFFECTORS
I. INDEPENDENT EFFECTORS1
G. H. PARKER
THE physiological unit in the operations of the nervous system is the reflex. Broadly understood, this consists of the chain of consequences that begins with the reception of a stimulus on the surface of the animal and, leading through the central nervous organs, ends in the excitation of a reaction by some such organ as a muscle.
Those who intend to study medicine are advised by the Medical Faculty to pay special attention to the study of Natural History, Chemistry, Physics, and the French and German languages, while in College. This sentence of advice is contained in the catalogue of Harvard University issued in 1874.
REVOLUTIONIZING as the life work of Charles Darwin was in the fields of biology and psychology, one may doubt if his writings disturbed the intellectual peace anywhere more profoundly than in the “Sweet Jerusalem” of pre-Darwinian social philosophy.
THAT the publication of the “Origin of Species” marked an epoch in the development of the natural sciences is well known to the layman. That the combination of the very words origin and species embodied an intellectual revolt and introduced a new intellectual temper is easily overlooked by the expert.
AT this commencement season university presidents and others are likely to make addresses to academic audiences and the problems of the college and of the college student are likely to be subjects for comment in the daily papers and the monthly magazines.