Scientific Works published by Loiiguians^ Green, &^ Co. 1 1 



UN^W'IN— The Elements of Machine Design. By W. Caw- 

 THORXE Unwin, F.K.S., Professor of Eiigiiieeriiig at the Central 

 Institute of the City and Guilds of London Institute. Part I. General 

 Principles. Fastenings and Transniissive Machinery. With 304 Dia- 

 grams, &c. Crown 8vo. 6s. Part II. Chieily on Engine Details. 

 With 174 Woodcuts. Crown 8vo. 4.s. 6'd 



ARCHITECTURE. 



G WILT— An Encyclopaedia of Architecture. By Jo-seph Gwilt, 

 F.S.A. Illustrated with more than llUO Engravings on Wood. 

 Eevised (1888), with Alterations and Considerable Additions, by 

 Wyatt Papworth. 8vo. i'2 12s. 6rf. 



MITCHELL. — The Stepping-Stone to Architecture : explaining 

 in simple language the principles and progress of Architecture from 

 the earliest times. Bv Thomas Mitchell. With 22 Plates and 49 

 Woodcuts. 18mo. l.s. sewed. 



ASTRONOMY AND NAVIGATION. 



BALL — Elements of Astronomy. With 136 Figures and Diagrams. 

 By Sir Robert S. Ball, LL.D., F.E.S. With 136 Woodcuts.^ Fcp. 

 8vo. 6s. 



*<.* The reader of this vohime is expected to possess such knowledge of matheinatic.'? 

 as 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 contains 

 chapters on the Instruments used in Astronomical Observations, the Earth, the Diurnal 

 Motion of the Heavens, the Sun, Motion of the Earth around the Sun, the Moon, the 

 Planets, Comets and Meteors, Universal Gravitation, Stars and Nebula", the Structure of 

 the Sun, Astronomical Constants, &c., &c. 



A Class-Book of Astronomy. By Sir Robert S. Ball. 



LL.D., F.R.S. With 41 Diagrams. Fcp. 8vg. \s. 6d. 



BCEDDICKER— The Milky Way. From the North Pole to 10' of 

 South Declination. Drawn at the Earl of Rosse's Observatory at Birr 

 Castle. By Otto Bceddicker. With Descriptive Letterpress. 4 

 Plates, size 18 in. by -23 in. in portfolio, '30s. 



BRINKLEY'S Astronomy. Re-edited and Revised bv J. W. Stubbs, 

 D.D., and F. Brunnow, Ph.D. With 49 Diagrams. Crown 8vu. Ss. 



CLERKE— The System of the Stars. By Agnes M. Clerke, 

 Author of 'A History of Astronomy during tlie Nineteenth Century '. 

 With 6 Plates and numerous Illustrations. 8vo. 21s. 



HBRSCHBL -Outlines of Astronomy. By Sir John F. W. 

 Herschel, Bart., K.H., &c., Member uf the In.stitute of France. 

 With 9 Plates and numerous Diagrams. Square crown 8vo. 12s. 



MARTIN — Navigation and Nautical Astronomy. Compiled 

 by Staff-Commander W. R. Martin, R.N., Instructor in Surveying, 

 Navigation and Compass Adjustment ; Lecturer on Meteorology at 

 the Royal Naval C(jllege, Greenwich. Sanctioned for use in the 

 Royal Navy by the Lords Commissioners of the Admiralty. New 

 Edition. Royal 8vo. 18s. 



