The book is sure to throw a good deal of light upon the scientific researches of the ancient Aryans of India, and it will leave no doubt in a candid mind that the religion of ancient India had a scientific basis. It is chiefly for this reason that I have drawn my illustrations from the Tattvic Law from the Upanishads. There is a good deal in the book which can only be shown to be true by long and diligent experiment. Those who are devoted to the pursuit of truth without prejudice will no doubt be ready to wait before they form any opinion about such portions of the book. Others it is useless to reason with.