* * * * * INDIAN SKETCH BOOK. Indian Sketches, taken during an Expedition to the Pawnee Tribes. By JOHN T. IRVING, Jun'r. _Two Volumes, 12mo._ * * * * * The Conquest of Florida by Hernando de Soto. By THEODORE IRVING, Esq. _In Two Volumes, 12mo._ * * * * * The Third Series of PENCIL SKETCHES; Or, Outlines of Character and Manners. By MISS LESLIE. Containing--The Red Box, or Scenes at the General Wayne; Constance Allerton, or the Mourning Suits; The Officers, or a Story of the Late War; The Serenades, including the Dream of Songs; The Old Farm House; That Gentleman, or Scenes on Shipboard; Chase Loring, a Tale of the Revolution; Alphonsine, &c. _In One Volume, 12mo._ Also for sale, a few copies of the second series. * * * * * THE CHEMISTRY OF THE ARTS; On the Basis of Gray's Operative Chemist. Being an Exhibition of the Arts and Manufactures dependent on Chemical Principles. _With Numerous Engravings._ By ARTHUR L. PORTER, M.D., late Professor of Chemistry, &c., in the University of Vermont. With Numerous Plates. * * * * * MILLWRIGHT and MILLER'S GUIDE. By OLIVER EVANS. New Edition, with Additions and Corrections, by the Professor of Mechanics in the Franklin Institute of Pennsylvania; and a Description of an Improved Merchant Flour Mill. With Engravings. By C. & O. EVANS, Engineers. * * * * * A Treatise on Mechanics. By Capt. KATER and the Rev. DIONYSIUS LARDNER. _With Numerous Engravings._ A New Edition. * * * * * ATLAS OF ANCIENT GEOGRAPHY. CONSISTING OF Twenty-One Coloured Maps. With a complete Accentuated Index. By SAMUEL BUTLER, D.D., F.R.S., &c, Archdeacon of Derby. By the same Author. GEOGRAPHIA CLASSICA: A Sketch of Ancient Geography. For the use of schools. _In Octavo._ * * * * * GREEK AND ENGLISH LEXICON. By D. DONNEGAN. Abridged for the use of schools. _In One Volume, Royal 18mo._ Containing above 800 pages. * * * * * A TREATISE ON Hydrostatics and Pneumatics. By the Rev. DIONYSIUS LARDNER, L.L.D., F.R.S., &c. A new American from the last London Edition, with Notes by BENJAMIN F. JOSLIN, M.D., Professor of Natural Philosophy in Union College. * * * * * ELEMENTS OF OPTICS. By DAVID BREWSTER. A new American Edition, with Notes and Additions, by A. D. BACHE, Professor of Natural Philosophy and Chemistry in the University of Pennsylvania. _In One Volume, 12mo._ * * * * * PRELIMINARY DISCOURSE ON THE Objects, Advantages, and Pleasures of the Study of Natural Philosophy.