PHYSICAL SCIENCE. 



Wilson (W. P.) — A TREATISE ON DYNAMICS, liy 

 W. P. Wilson, M.A., Fellow of St. John's College, Cambridge, 

 and Professor of Mathematics in Queen's College, Belfast. Svo. 

 gs. 6a. 



Wolstenholme. — A BOOK OF MATHEMATICAL 

 PROBLEMS, on Subjects included in the Cambridge Course. 

 By Joseph Wolstenholme, Fellow of Christ's College, some 

 time Fellow of St. John's College, and lately Lecturer in Mathe- 

 matics at Christ's College. Crown 8vo. cloth. Ss. 6d. 



Young.— SIMPLE PRACTICAL METHODS OF CALCU 

 LATINO STRAINS ON GIRDERS, ARCHES, AND 

 TRUSSES. With a Supplementary Essay on Economy in suspen- 

 sion Bridges. By E. W. Young, Associate of King's College, 

 London, and Member of the Institution of Civil Engineers. Svo. 

 7 jr. 6d. 



"A u excellent combination of theoretical methods of finding strains 

 in beams and structures, as modified by practical experience. Hie 

 reasoning is clear, and the equations are simple enough, and do not 

 require more than a knowledge of elementary algebra and trigono- 

 metry for their solution. The diagrams are especially clear." — 

 Architect. 



PHYSICAL SCIENCE. 



Airy (G. B.) — POPULAR ASTRONOMY. With Illustrations. 

 By Sir G. B. Airy, K.C.B., Astronomer Royal. Seventh and 

 cheaper Edition. iSmo. cloth. 4s. 6d. 



Hastian. — THE BEGINNINGS OF LIFE: Being some Account 

 of the Nature, Modes of Origin, and Transformations of Lower 

 Organisms. By H. Charlton Bastian, M.D., F.R.S., Pro 

 fessor of Pathological Anatomy in University College, London, 

 &c. In Two Volumes. With upwards of 100 Illustrations, 

 Crown Svo. 2Ss. 



"It is a book that cannot be ignored, and must inevitably lead to 

 renewed discussions and repeated observations, and through these to 

 the establishment of truth:'— A. R. Wallace in Nature. 



Blanford (W. T.)— GEOLOGY AND ZOOLOGY OF 

 ABYSSINIA. By W r . T. Blanford. Svo. 21s. 

 ■ This work contains an account of the Geological and Zoological Obser- 

 vations made by the author in Abyssinia, when accompanying the 

 British Army on its march to Mqgdala and back in 1S6S, and 

 during a short journey in Northern Abyssinia, after the departure 

 of the troops. Part I. Personal Narrative; Part II. Geology ; 

 Part III. Zoology. With Coloured Illustrations and Geological 

 Map. "The result of his labours," the Academy says,^ is an 

 important contribution to the natural history op the country. " 



