SCIENTIFIC CATALOGUE. 



Godfray. — Works by Hugh Godfray, M.A., Mathematical 

 Lecturer at Pembroke College, Cambridge : — 

 A TREATISE ON ASTRONOMY, for the Use of Colleges and 

 Schools. Svo. cloth. \is. 6d. 



"It is a working book" says the Guardian, " taking Astronomy 

 in its proper place in the Mathematical Sciences. . . . It is a book 

 which is not likely to be got up unintelligently." 



AN ELEMENTARY TREATISE ON THE LUNAR 

 THEORY, with a Brief Sketch of the Problem up to the time of 

 Newton. Second Edition, revised. Crown Svo. cloth. 5^. 6d. 

 "As an elementary treatise and introduction to the subject, we think 

 it may justly claim to supersede all former ones." — London, Edin- 

 burgh, and Dublin Phil. Magazine. 



Green (George).— MATHEMATICAL PAPERS OF THE 



LATE GEORGE GREEN, Fellow of Gonville and Caius 



College, Cambridge. Edited by N. M. Ferrers, M.A., Fellow 



and Tutor of Gonville and Caius College. 8vo. 15^. 



The publication of this book may be opportune at present, as several 



of the subjects with which they are directly or indirectly concerned 



have recently been introduced into the course of mathematical 



study at Cambridge. They have also an interest as being the work 



of an almost entirely self-taught mathematical genius. " It has 



been for some time recognized that Green' 's writings are amongst 



the most valuable mathematical productions we possess." — 



Athenceum. 



Hemming. — AN ELEMENTARY TREATISE ON THE 

 DIFFERENTIAL AND INTEGRAL CALCULUS. For the 

 Use of Colleges and Schools. By G. W. Hemming, M.A., 

 Fellow of St. John's College, Cambridge. Second Edition, with 

 Corrections and Additions. 8vo. cloth, gs. 



" There ts no book in common use from which so clear and exact a 

 knowledge of the principles of the Calculus can be so readily ob- 

 tained." — Literary Gazette. 



Jackson. — GEOMETRICAL CONIC SECTIONS. An Ele- 

 mentary Treatise in which the Conic Sections are defined as the 

 Plane Sections of a Cone, and treated by the Method of Projections. 

 By T. Stuart Jackson, M. A., late Fellow of Gonville and Caius 

 College. Crown Svo. 4s. 6d. 



This work has been written with a view to give the student the benefit 

 of the Method of Projections as applied to the Ellipse and Hypc7'bola. 



Kelland and Tait.— an INTRODUCTION TO QUATER- 

 NIONS. With numerous Examples. By P. Kelland, M.A., 

 F.R.S., and P. G. Tait, M.A., Professors in the department of 

 Mathematics in the University of Edinburgh. Crown 8vo. Js. 6d. 

 This work is an attempt to make it possible to introduce the subject of 

 Quaternions into an Elementary Course of Mathematics ; it is 



