By SIMON NEWCOMB, LL.D.,

PROFESSOR, U. S. NAVAL OBSERVATORY, AUTHOR OF "THE ABC OF FINANCE."

With One Hundred and Twelve Engravings, and Five Maps of the Stars.

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The great reputation which the author of this work has merited and enjoys, both in this country and in Europe, is a sufficient guarantee of its excellence. *** He has dwelt especially upon those topics which have just now a popular and philosophic interest, carefully employing such language and such simple explanations as will be intelligible without laborious study. Technical terms have as much as possible been avoided. Such as were employed of necessity, and many that occur elsewhere, have been fully explained in a copious glossary at the end of the book. With its abundant aid, the reader cannot fail to derive both pleasure and entertainment from the study of what is the most ancient as well as the most elevating and inspiring of all the natural sciences. *** Professor Newcomb, throughout his whole volume, preserves his well-known character as a writer who, in treating of scientific subjects, fully understands the art of bring. ing them within the range of popular comprehension. Although his book is a valuable addition to scientific literature, it is fully calculated to hold the attention of the general reader.-N. Y. Times.

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By Lady ANNE BLUNT. Edited, with a Preface and some Account of the Arabs and their Horses, by W. S. B. Map and Sketches by the Author. 8vo, Cloth, $2 50.

The book is a fascinating one, the more so because the author, who has a wholesome love of the outer air and a healthy woman's carelessness of physical comfort, nowhere wearies her readers with querulous complainings; indeed, she appears from first to last to have retained her high spirits throughout the toilsome journey, and keenly to have enjoyed each day's ride upon her superb mare or upon her camel. * * * It is a work worthy of all praise for simplicity, directness of purpose, and uniform interest. As the Lady Anne Blunt and her companion were the first European travellers who ever made themselves at home among the Bedouin Arabs, so they have given us such an account of the strange people visited as to leave little for later travellers to tell concerning them.N. Y. Evening Post.

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THE RISE OF THE DUTCH REPUBLIC. A History. By JOHN LоTHROP MOTLEY, LL.D., D.C.L. With a Portrait of William of Orange. 3 volumes, Svo, Cloth with Paper Labels, Uncut Edges and Gilt Tops, $6 00. Sold only in Sets.

HISTORY OF THE UNITED NETHERLANDS: from the Death of William the Silent to the Twelve-Years' Truce. With a full View of the English-Dutch Struggle against Spain, and of the Origin and Destruction of the Spanish Armada. By JOHN LоTHROP MOTLEY, LL.D., D.C.L. With Portraits. 4 vols., 8vo, Cloth with Paper Labels, Uncut Edges and Gilt Tops, $8 00. Sold only in Sets.

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OF ALL TIMES AND NATIONS.

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By WILLIAM C. PRIME, LL.D.

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The outgrowth of the author's studies for yearsnot at all exclusive, but as an indulged and engrossing pastime-it gathers up in systematic form the results of his study, travel, and collections, but at the same time expands without hesitation upon any topic in his way that is favorite or more than usually familiar. Neglecting nothing in the proper scope of the work, it spares the reader much dry epitomizing from other works, gives the old information in a fresh way, and the author's special results with the ease and thoroughness of a master. *** The book is a fit ornament for any library; but to ardent lovers of the science is simply a necessity.-Sunday School Times, Philadelphia.

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