MATHEMATICS. 



Equations will be found in this Essay integrated with ease in finite 

 terms, which were never so integrated before. 



Ferrers. AN ELEMENTARY TREATISE ON TRILINEAR 



CO-ORDINATES, the Method of Reciprocal Polars, and the 

 Theory of Projectors. By the Rev. N. M. FERRERS, M. A., Fellow 

 and Tutor of Gonville and Caius College, Cambridge. Second 

 Edition. Crown 8vo. 6s. 6d. 



The object of the author in writing on this subject has mainly been to 

 place it on a basis altogether independent of the ordinary Cartesian 

 system, instead of regarding it as only a special form of Abridged 

 Notation. A short chapter on Determinants has been introduced. 



FrOSt. THE FIRST THREE SECTIONS OF NEWTON'S 

 PRINCIPIA. With Notes and Illustrations. Also a Collection 

 of Problems, principally intended as Examples of Newton's 

 Methods. By PERCIVAL FROST, M.A., late Fellow of St. John's 

 College, Mathematical Lecturer of King's College, Cambridge. 

 Second Edition. 8vo. cloth, los. 6d. 



The author's principal intention is to explain difficulties which may be 

 encountered by the student ^>n first reading the Principia, and to 

 illustrate the advantages of a careful study of the methods employed 

 by Newton, by showing the extent to which they may be applied in 

 the solution of problems ; he has also endeavoured to give a,ssistance 

 to the student who is engaged in the study of the higher branches of 

 mathematics, by representing in a geometrical form several of the 

 processes employed in the Differential and Integral Calcuhis, and in 

 the analytical investigations of Dynamics. 



Frost and Wolstenholme. A TREATISE ON SOLID 

 GEOMETRY. By PERCIVAL FROST, M.A., and the Rev. J. 

 WOLSTENHOLME, M.A., Fellow and Assistant Tutor of Christ's 

 College. Svo. cloth. iSs. 



Intending to make the subject accessible, at least in the earlier portions 

 to all classes of students, the authors have endeavoured to explain 

 completely all the processes which are most useful in dealing with 

 ordinary theorems and problems, thus directing the sttident to the 

 selection of methods which are best adapted to the exigencies of each 

 problem. In the more difficult portions of the subject, they have 



