It contains instructive and attractive articles, and abstracts of articles, original, selected, and illustrated, from the leading scientific men of different countries, giving the latest interpretations of natural phenomena, explaining the applications of science to the practical arts, and to the operations of domestic life. It is designed to give especial prominence to those branches of science which help to a better understanding of the nature of man; to present the claims of scientific education; and the bearings of science upon questions of society and government. How the various subjects of current opinion are affected by the advance of scientific inquiry will also be considered. In its literary character, this periodical aims to be popular, without being superficial, and appeals to the intelligent reading-classes of the community. It seeks to procure authentic statements from men who know their subjects, and who will address the non-scientific public for purposes of exposition and explanation. It will have contributions from HERBERT SPENCER, Professor HUXLEY, Professor TYNDALL, Mr. DARWIN, and other writers identified with speculative thought and scientific investigation. _THE POPULAR SCIENCE MONTHLY is published in a large octavo, handsomely printed on clear type. Terms, Five Dollars per annum, or Fifty Cents per copy._ OPINIONS OF THE PRESS. "Just the publication needed at the present day."--_Montreal Gazette._ "It is, beyond comparison, the best attempt at journalism of the kind ever made in this country."--_Home Journal._ "The initial number is admirably constituted."--_Evening Mail._ "In our opinion, the right idea has been happily hit in the plan of this new monthly."--Buffalo Courier. "A journal which promises to be of eminent value to the cause of popular education in this country."--_N. Y. Tribune._ =IMPORTANT TO CLUBS.= THE POPULAR SCIENCE MONTHLY will be supplied at reduced rates with any periodical published in this country. Any person remitting Twenty Dollars for four yearly subscriptions will receive an extra copy gratis, or five yearly subscriptions for $20. THE POPULAR SCIENCE MONTHLY and APPLETONS' JOURNAL (weekly), per annum, $8.00. ==>_Payment, in all cases, must be in advance._ Remittances should be made by postal money-order or check to the Publishers, =D. APPLETON & CO., 549 & 551 Broadway, New York.= THE GREVILLE MEMOIRS. COMPLETE IN TWO VOLS. A JOURNAL OF THE REIGNS OF King George IV. & King William IV. By the Late CHAS. C. F. GREVILLE, Esq., Clerk of the Council to those Sovereigns. Edited by HENRY REEVE, Registrar of the Privy Council. 12mo. PRICE, $4.00. _This edition contains the complete text as published in the three volumes of the English edition._