Scientific Works published by Longmans, Green, <&» Co. 11
UNWIN—The Elements of Machine Design. By W. Caw-thorne Unwin, F.R.S., Professor of Engineering at the CentralInstitute of the City and Guilds of London Institute . Part I. GeneralPrinciples, Fastenings and Transmissive Machinery. With 304 Dia-grams, &c. Crown 8vo. 6s. Part II. Chiefly on Engine Details.With 174 Woodcuts. Crown 8vo. 4s. 6 d.
ARCHITECTURE.
G-WIL/T—An Encyclopaedia of Architecture. By Joseph Gwilt ,P.S.A. Illustrated with more than 1100 Engravings on Wood.Revised (1888), with Alterations and Considerable Additions, byWyatt Papworth. 8vo. .£2 12s. 6 d.
MITCHELL —The Stepping-Stone to Architecture : explainingin simple language the principles and progress of Architecture fromthe earliest times. By Thomas Mitchell . With 22 Plates and 40Woodcuts. 18mo. Is. sewed.
ASTRONOMY AND NAVIGATION.
BALL—Elements of Astronomy. With 136 Figures and Diagrams.By Sir Robert S. Ball , LL.D., F.R.S. With 136 Woodcuts. Fcp.8vo. 6s.
\ The reader of this volume is expected to possess such knowledge of mathematicsas may be gained by studying the Elements of Euclid and Algebra , together with a rudi-mentary acquaintance with the geometry of Planes and Spheres. The book containschapters on the Instruments used in Astronomical Observations, the Earth , the DiurnalMotion of the Heavens, the Sun, Motion of the Earth around the Sun, the Moon , thePlanets , Comets and Meteors, Universal Gravitation , Stars and Nebulae , the Structure ofthe Sun, Astronomical Constants, <fcc., &c.
- A Class-Book of Astronomy. By Sir Robert S. Ball ,
LL.D., F.R.S. With 41 Diagrams. Fcp. 8vo. Is. 6 d.
BCEDDICKER—The Milky Way. From the North Pole to 10° ofSouth Declination. Drawn at the Earl of Rosse’s Observatory at BirrCastle. By Otto Bceddicker. With Descriptive Letterpress. 4Plates, size 18 in. by 23 in. in portfolio, 30s.
BRINKLEY’S Astronomy. Re-edited and Revised by .1. W. Stubbs.D.I)., and F. Brunnow, Ph.D. With 49 Diagrams. Crown 8vo. 6s.
CLERKE —The System of the Stars. By Agnes M. Clerke ,Author of ‘ A History of Astronomy during the Nineteenth Century ’.With 6 Plates and numerous Illustrations. 8vo. 21s.
HERSCHEL— Outlines of Astronomy. By Sir John F. MbHerschel, Bart., K.H., &c., Member of the Institute of France .With 9 Plates and numerous Diagrams. Square crown 8vo. 12s.
MARTIN—Navigation and Nautical Astronomy. Compiledby Staff-Commander W. R. Martin, R.N., Instructor in Surveying,Navigation and Compass Adjustment ; Lecturer on Meteorology atthe Royal Naval College, Greenwich. Sanctioned for use in theRoyal Navy by the Lords Commissioners of the Admiralty. NewEdition, Ijtoval 8vo. 18s.