Scientific Works published by Longmans ', Green , 6 C0. 15 



MACHINE DRAWING AND DESIGN. 



LOW and BEVIS A Manual of Machine Drawing and Design. By 



DAVID ALLAN Low (Whitworth Scholar), M.I. Mech. E., Headmaster 

 of the Technical School, People's Palace, London; and ALFRED 

 WILLIAM BEVIS (Whitworth Scholar), M.I. Mech.E., Director of 

 Manual Training to the Birmingham School Board. With over 700 

 Illustrations. 8vo. 7s. 6d. 



LOW Improved Drawing Scales. By DAVID ALLAN Low. d. in case. 



LOW An Introduction to Machine Drawing and Design. By DAVID 



ALLAN Low, Headmaster of the Technical School, People's Palace, 

 London. With 97 Illustrations and Diagrams. Crown 8vo. 2s. 



UNWIN The Elements of Machine Design. By W. CAWTHORNB 

 UN WIN, F.R.S., Part I. General Principles, Fastenings and Trans- 

 missive Machinery. With 304 Diagrams, &c. Crown 8vo. 6s. Part II. 

 Chiefly on Engine Details. With 174 Woodcuts. Crown 8vo. 4s. 6d. 



ASTRONOMY, NAVIGATION, &c. 



BALL Works by Sir ROBERT S. BALL, LL.D., F.R.S. 



Elements of Astronomy. With 136 Figures and Diagrams, and 



136 Woodcuts. Fcp. 8vo. 6s. 



A Class-Book of Astronomy. With 41 Diagrams. Fcp. 8vo. Is. 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 BOSDDICKER. With Descriptive Letterpress. 4 Plates, size 

 18 in. by 23 in. in portfolio. 30s. 



BRINKLEY Astronomy. By F. BRINKLEY, formerly Astronomer Royal 

 for Ireland. Re-edited and Revised by J. W. STUBBS, D.D., and F. 

 BRDNNOW, Ph.D. With 49 Diagrams. Crown 8vo. 65. 



CLERKE The System of the Stars. By AGNES M. CLERKE. With 6 

 Plates and numerous Illustrations. 8vo. 21s. 



GIBSON-The iinateur Telescopist's Handbook. By FRANK M. 

 GIBSON, Ph.D., LL.B. With 1 Plate and 13 Diagrams. Cr. 8vo. 3s. 6d. 



HERSCHEL Outlines of Astronomy. By Sir JOHN F. W. HERSCHEL, 

 Bart.,K.H.,&c. With 9 Plates and numerous Diagrams. Crown 8vo. 12s. 



MARTIN Navigation and Nautical Astronomy. Compiled by Staff- 

 Commander W. R. MARTIN, R.N. Royal 8vo. 18s. 



MERRIFIELD A Treatise on Navigation for the use of Students. By 

 JOHN MERRIFIELD, LL.D., F.R.A.S., F.M.S. Crown 8vo. 5s. 



WEBB Celestial Objects for Common Telescopes. By the Rev. T. W. 

 WEBB, M.A., F.R.A.S. Fifth Edition, Revised and greatly Enlarged, 

 by the Rev. T. E. ESPIN, M.A., F.R.A.S. (2 vols.) Vol. I., with 

 2 Plates and numerous Illustrations. Crown 8vo. 6s. Vol. II., with 

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