This is but an instance of a policy which had been pursued for a very considerable period anterior to the time of Hipparchos. Just so much was given as would afford a stimulus for investigation; for humanity entered upon novel and strenuous conditions some five thousand years ago, and has had to win for itself a new path in science, as in other departments of activity. Key-notes are sounded, and instruction given, at cyclic periods; yet man must win his own path to knowledge, and guarded sources of information could not help him, until he prove himself morally as well as intellectually fitted to advance. This brings us naturally to a survey of modern achievement in astronomy, and the conclusion is almost irresistible that it has reached a point where further light must come, if only the enthusiastic followers of this kingly science would raise their eyes from the mechanical skeleton they have built so laboriously, and realize that the universe is living and conscious--in the interstellar spaces, as well as in the little fiery-looking balls that float therein. We should remember that it is part of human destiny to enter into the wider consciousness which alone holds the master-clues. The above conclusion is supported by the statement of Simon Newcomb that the unsolved problems of astronomy seem to increase with every year, instead of diminishing. It is a curious reflection, in these days of "exact" science, that real exactitude can only be obtained, as in pure mathematics, by proceeding from universals to particulars, never from particulars to universals. Yet the latter method has perforce to be adopted when no other way is in sight. That it fails, is shown by the simple fact that few of the "elements" or "constants" in modern astronomy are exactly known. No tables have yet been constructed, based upon purely mathematical formulae, which represent the actual motions, say of the superior planets. Those in the _Nautical Almanac_ are simply derived from such hypothetical formulae, with corrections found necessary by experience extended over what is an almost ludicrously insufficient term of years. We should like to see the astronomical formula in use which would show that the obliquity of the ecliptic, 23,000 years ago, was slightly more than 27°. No longer ago than August 1905 an eclipse of the sun began twenty seconds before the predicted time. Fortunately our astronomers do not live in ancient China, or they might have been beheaded for this want of accuracy! On the other hand, the achievements in the domain of theory during the last two centuries or less have been so remarkable that it is to be hoped the methods and facts given in the _Sûrya-Siddhânta_ may yet receive some attention from competent mathematicians, once they perceive their importance. The apparent discrepancies with modern facts, it may be pretty safely asserted, will be found to yield valuable results upon careful analysis.