In the year 1907 the author made a remarkable discovery which convinced him that the sun was very much nearer to the earth than was generally supposed. The fact he had discovered was demonstrated beyond all doubt, so that he was compelled to believe thatÑhowever improbable it might seemÑastronomers had made a mistake when they estimated the distance of the sun to be ninety-three millions of miles. The author has taken the unusual course of submitting these new and startling theories for the consideration of the general public because the responsible scientific societies in London, Washington and Paris, failed to deal with the detailed accounts of the work which he forwarded to them in the Spring of 1920. He believes that every newly-discovered truth belongs to the whole of mankind, wherefore, if those whose business it is to consider his work fail in their duty he does not hesitate to bring it himself direct to the people, assured of their goodwill and fair judgment.