6 WORKS PUBLISHED BY 
PURE MATHEMATICS. 
* De Morgan's Elements of Arithmetic. 
Fifteenth Thousand. Royal 12mo. 5s. cloth. 
De Morgan’s Trigonometry and Double Algebra, 
Royal 12mo. 7s. 6d. cloth. f 
De Morgan’s Arithmetical Books and Authors. From the 
Invention of Printing to the Present Time ; being Brief Notices of a large Number 
of Works drawn up from Actual Inspection. Royal 12mo. 2s. 6d. cloth. 
* Ellenberger’s Course of Arithmetic, as taught in the Pes - 
talozzian School, Worksop. Post 8vo. 5s. cloth. 
*** The Answers to the Questions in this Volume are now ready , price Is. 6d. 
Masons First Book of Euclid. Explained to Beginners. 
Fcap. 8vo. Is. 9d. 
Reiner s Lessons on Form; or, An Introduction to Geo¬ 
metry, as given in a Pestalozzian School, Cheam, Surrey, 12mo., with numerous 
Diagrams. 3s. 6d. cloth. 
* Reiner s Lessons on Number, as given in a Pestalozzian 
School at Cheam, Surrey. The Master’s Manual. New Edition. 12mo. cloth, 5s. 
The Scholar’s Praxis. 12mo. 2s. bound. 
Newmans (F. W.) Difficulties of Elementary Geometry , 
especially those which concern the Straight-line, the Plane, and the Theory of 
Parallels. 8vo. cloth, 5s. 
* Tables of Logarithms Common and Trigonometrical to 
Five Places. Under the Superintendence of the Society for the Diffusion of Useful 
Knowledge . Fcap. 8vo. ls.6d. 
Four Figure Logarithms and Anti-Logarithms. On a 
Card. Price Is. 
Barlow’s Tables of Squares, Cubes, Square Roots, Cube 
Roots, and Reciprocals of all Integer Numbers, up to 10,000. Stereotype Edition, 
examined and corrected. Under the Superintendence of the Society for the Diffusion 
of Useful Knowledge . Royal 12mo. 8s. cloth. 
Wedgwood's Geometry of the First Three Books of Euclid, 
by direct proof from Definitions alone. With an Introduction on the Principles of 
the Science. 12mo. 2s. 6d. 
MIXED MATHEMATICS. 
* Potter's Elementary Treatise on Mechanics , for the Use 
of the Junior University Students. By Richard Potter, M.A., Professor of 
Natural Philosophy in University College, London. Third Edition. 8vo., with 
numerous Diagrams. 8s. 6d. cloth. 
Potter’s Elementary Treatise on Optics. Part I. Con- 
taining all the requisite Propositions carried to First Approximations, with the 
construction of Optical Instruments, for the Use of Junior University Students. 
Second Edition. 8vo. 9s. 6d. cloth. 
