Digital Commonwealth — Boston Public Library
New Invention Shows Movements of Solar System. A wonderful machine has just been perfected by Diego Arzic, a mechanical engineer from Chicago, which will enable scientists and students to determine the position of the Sun moon or the Earth in hundred thousand years from today. This mechanical solar system represents the Sun, at the right, the Moon in the center and the earth and the left of the picture. The complete machine is made of steel and is mounted on a steel platform 9 feet in diameter. The machine will record the following movements, all of which are regulated by a clock which shows central standard time. That evolution of the Earth around the Sun, completing a revolution in one sideral year. Earth's axis is 23.0 27' inclined toward the elliptic and traveling around the Sun always keeping the inclination in the same direction (toward the celestial pool); the orbit is of the elliptical form and divided into 24 hours, and in turn each other in 60 minutes, so that the right ascension of the Earth and the Sun can be read instantly, besides, the Earth's orbit bears the names of 12 signs of zodiac. It also records, movements of the precession of equinoxis, the equator plane making westward revolution in about 25,836 years, always keeping the same inclination toward the elliptic. Movements of the Earth's apsides, making a revolution in about 112,687 years. Moon is revolving around the Earth which carries it on its journey towards the Sun in one plane, which is inclined .09' toward elliptic, making a revolution every sideral month and coming in conjunction every periodical month. The mechanism, furthermore shows Central Time, the date, the month and the year. A powerful spring situated in the center, imparts all movements and is so arranged that all movements keep peace with the celestial machinery. By placing the earth and moon in different positions Mr Arzic is able to determine the date and year that any change in our solar system will occur. The models of the Moon and Earth are a little exaggerated, but they can be substituted with right sizes when eclipses occur to determine the size. The Sun and Moon are lighted by an electric bulb to get the effects.
Unknown artist