ANNOUNCEMENTS. 



i. 

 On the Origin and Succession of Life on the Earth. 



By JOHN PHILLIPS, M.A. F.R.S. F.G.S., Reader in Geology in 

 the University of Oxford, and Rede Lecturer in the University 

 of Cambridge, c. With Illustrations. Crown Svo. 



II. 



Life of Edward Forbes, THE NATURALIST. By GEORGE 

 WILSON, M.D., late Professor of Technology in the University of 

 Edinburgh, and ARCHIBALD GEIKIE, F.G.S., of tbe Geological 

 Survey. 



III. 



Introduction to the Study and Use of the Psalms. 



By the Rev. J. F. THRUPP, Author of " An Investigation into 

 the Topography, &c. of Ancient Jerusalem," &c. 2 vols. Svo. 



IV. 



Rays of Sunlight for Dark Days : A Book of Selections 



for the Suffering. Royal 32mo. elegantly printed. 



v. 

 An Elementary Treatise on Quaternions. With numerous 



Examples. By P. G. TAIT, M.A., Professor of Natural Philosophy 

 in the University of Edinburgh. 



VI. 



A Treatise on the Dynamics of a Rigid Body. By 



E. J. ROTJTH, M.A., and C. A. SMITH, B. A., Fellows of St. Peter's 

 College, Cambridge. 



VII. 



A Treatise on Geometry of Three Dimensions. By 



PERCIVAL FROST, M. A., St. John's College, and JOSEPH WOLSTEN- 

 HOLME, M.A., Christ's College, Cambridge. 



VIII. 



An Elementary Treatise on Statics. By GEORGE RAWLIN- 



SON, M.A., late Professor of Natural Philosophy in Elphinstone 

 Institution, Bombay, formerly of Emmanuel College, Cambridge. 



IX. 



A Treatise on Trilinear Co-ordinates. By N. M. FERRERS, 



M.A., Fellow and Mathematical Lecturer of Gonville and Caius 

 College. 



R. CLAY, PRINTER, BREAD STREET HILL. 



