Seconded., Kevised. In Large8vo. Cloth. Pp.i-x+131. ManylU ustrationB. THE PROBLEM OF FLIGHT. A TEXT-BOOK OF AERIAL ENGINEERING. By HERBERT CHATLEY, B.S c. Eno. (L ond.), Professor of Civil Engineering, Tong Shan Engineering College, N. China. An epitome of the knowledge available on the subject, Scot wan. In Crown 8vo, Cloth. Pp. i-viii+83. Illustrated with Diagrams. THE FORCE OF THE WIND. By HERBERT CHATLEY, B.S c. Eng. (L ond.), Could not well be more terse or pointed. Symon 8M eteorological Magazine. In Handsome Cloth. I llustrated. Pocket Size, Pp. i-xi+179. A COMPENDIUM OF AVIATION AND AEROSTATION, Balloons, Dirigibles, andF lying IM achlnes. By Lieut.-C ol. H. HOERNES. Translated andS upplemented with Facts of Interest toE nglish readers .., details regarding British Dirigibles, A eroplanes, Flying Grounds, etc. with an Introduction and Biographical Sketch of the Author by J. H. Ledeboer, Editor of A eronautics. A very readable popular handbook. Nature. Fifth Edition, Revised andE nlarged. Pp. i-xxiii+639. Large 8vo, Handsome Cloth. With 243 I llustrations. A TEXT-BOOK ON GAS, OIL, AIR ENGINES. By BRYAN DONKIN, M.T nst.C.E., M.I nst.xM ech.E. Revised throughout by T. Graves Smith. With important New Matter by Prof. Burstall. A very much up-to-date classic. Dat7i Telegraph. In Demy 8vo. Pp. i-xiv-i-237. With I llustrations. EVOLUTION OF THE INTERNAL COMBUSTION ENGINE. By EDWARD BUTLER, Mkchanical Engineer. The Author sexperience gives him excellent qualiflcations for the task he has undertaken ... all who are interested in the practical working of combustion engines will find this volume interesting and worthy of a place on their bookshelf. ifecaiicai Engineer. In Medium 8vo. Handsome Cloth. Pp. i-viii-|-140. With 142 I llustrations. A TREATISE ON THE GAS TURBINE. Theory, Construction, and Working Results ofT wo IM achines in Actual Use. By HANS HOLZWA
(Typographical errors above are due to OCR software and don't occur in the book.)