According to Hipparchus and Ptolemy, the equinoxes preceded at the rate of a degree in 100 years, or 36,000 hundred years in 360 degrees. This constituted a great year, at the end of which the regeneration of all things takes place. This is thought to be a remnant of the most ancient Hindoo speculations, and not the result of observation among the Greeks. Some time after the arrival of the sun in Aries,

"at the vernal equinox, the Indians probably discovered their mistake, in giving about 60 years to a degree; that they ought to give 50" to a year, about 72 years to a degree, and about 2160 years to a sign; and that the Luni-Solar cycle, called the Neros, did not require 608 years, but 600 years only, to complete its period. Hence arose the more perfect Neros."

It is thought by various writers that the knowledge of the ancient Hindoos regarding the movements of the sun and moon in their cycles of nineteen and six hundred years—the Metonic cycle, and the Neros—proves that long before the birth of Hipparchus the length of the year was known with a degree of exactitude which that astronomer had not the means of determining. It is positively asserted by astronomers that at least twelve hundred years were required, "during which time the observations must have been taken with the greatest care and regularly recorded," to arrive at the knowledge necessary for the invention of the Neros, and that such observations would have been impossible without the aid of the telescope.

On the subject of the great learning of an ancient race, Sir W. Drummond says:

"The fact, however, is certain, that at some remote period there were mathematicians and astronomers who knew that the sun is in the centre of the planetary system, and that the earth, itself a planet, revolves round the central fire;—who calculated, or like ourselves attempted to calculate, the return of comets, and who knew that these bodies move in elliptic orbits, immensely elongated, having the sun in one of their foci;—who indicated the number of the solar years contained in the great cycle, by multiplying a period (variously called in the Zend, the Sanscrit, and the Chinese ven, van, and phen) of 180 years by another period of 144 years;—who reckoned the sun's distance from the earth at 800,000,000 of Olympic stadia; and who must, therefore, have taken the parallax of that luminary by a method, not only much more perfect than that said to be invented by Hipparchus, but little inferior in exactness to that now in use among the moderns;—who could scarcely have made a mere guess when they fixed the moon's distance from its primary planet at fifty-nine semi-diameters of the earth;—who had measured the circumference of our globe with so much exactness that their calculation only differed by a few feet from that made by our modern geometricians;—who held that the moon and the other planets were worlds like our own, and that the moon was diversified by mountains and valleys and seas;—who asserted that there was yet a planet which revolved round the sun, beyond the orbit of Saturn;—who reckoned the planets to be sixteen in number;—and who reckoned the length of the tropical year within three minutes of the true time; nor, indeed, were they wrong at all, if a tradition mentioned by Plutarch be correct."(64)

64) Drummond, On the Zodiacs, p. 36.

Bailly, Sir W. Jones, Higgins, and Ledwich, as well as many modern writers, agree in the conclusion that the Indians, the Egyptians, the Assyrians, and the Chinese were simply the depositaries, not the inventors, of science. The spirit of inquiry which in later times is directing attention to the almost buried past is revealing the fact that not merely the germs whence our present civilization has been developed descended to us from the dim ages of antiquity, but that a great number of the actual benefits which go to make up our present state of material progress have come to us from prehistoric times. The art of writing, of navigation (including the use of the compass), the working of metals, astronomy, the telescope, gunpowder, mathematics, democracy, building, weaving, dyeing, and many of the appliances of civilized life, have been appropriated by later ages with no acknowledgment of the source whence they were derived. When Pythagoras exhibited to the Greeks some beautiful specimens of ancient architecture which he had brought from Egypt and Babylon, they simply claimed them as their own, giving no credit to the people who originated them; and subsequent ages, copying their example, have refused to acknowledge that anything of value had been achieved prior to the first Greek Olympiad.

When Philip of Macedon opened the gold mines of Thrace, a country in which it will be remembered the worship of the Great Mother Cybele was indigenous, he found that they had been previously worked "at great expense and with great ingenuity by a people well versed in mechanics, of whom no monuments whatever are extant."

The decorations on the breasts of some of the oldest mummies show that the early Egyptians understood the art of making glass. It is now known that the lens as a magnifying instrument was in use among them. Attention has been drawn to the fact that the astronomical observations of the ancients would have been impossible without the aid of the telescope. Diodorus Siculus says there was an island west of the Celtae in which the Druids brought the sun and moon near them. An instrument has recently been found in the sands of the Nile, the construction of which shows plainly that 6000 years ago the Egyptians were acquainted with our modern ideas of the science of astronomy.

William Huntington, who has travelled widely in India, Borneo, the Malay Peninsula, and Egypt, says: