ANNOUNCEMENTS. 
I. 
Life of Edward Forbes, Taz Narvraust. By Gzorcz 
Witson, M.D., late Professor of Technology in the University of 
Edinburgh, and Arcurpatp Gxixiz, F.G.5., of the Geological 
Survey. 
IL 
An Elementary Treatise on Quaternions. With numerous 
Examples. By P.G. Tart, M.A., Professor of Natural Philosophy 
in the University of Edinburgh. 
Ill. 
A Treatise on Geometry of Three Dimensions. By 
Percrvau Frost, M.A., St. John’s College, and Josepx WoLsTEN- 
Hotz, M.A., Christ’s College, Cambridge. 
Iv. 
An Elementary Treatise-on Statics. By Gzorcr Rawziy- 
son, M.A., late Professor of Natural Philosophy in Elphinstone 
Institution, Bombay, formerly of Emmanuel College, Cambridge. 
Vv. 
A Treatise on Trilinear Co-ordinates. By N. M. Fernzzs, 
M.A., Fellow and Mathematical Lecturer of Gonville and Caius 
College. 
Vi. 
Vacation Tourists in 1860. Edited by Francis Gaxron, 
Author of “The Artof Travel.” Comprising Accounts, by Members 
of the University of Cambridge and others, of Tours in Italy, 
Iceland, the Alps, &e. 
VII. i 
Pictures of Old England. By Dz. Pavzz. Translated from the 
Original by E. C. Orrz. 
VIII. 
Lectures on the Apocalypse, or Book of the Revelations of 
St. John the Divine. By the Rev. F. D. Maurics, M.A. 
Ix 
Cicero’s Second Philippic with Notes and Introduction. 
Translated from the German of Kart Haru. By Joun E. B. 
Mayor, M.A. Fellow and Classical Lecturer of St. John’s 
College, Cambridge, Editor of * Juvenal,” &c. 
R. CLAY, PRINTER, BREAD STREET HILL. 
