402 MEMOIR OF AUGUSTUS DE MORGAN. 



(20) On the Method of teaching Fractional Arithmetic, 



vol. v. 



(21) On the Method of teaching the Elements of Geometry, 



vol. vi. 



(22) The School and Family Manual (rev.), vol. vi. 



(23) Method of teaching Geometry, No. 2, vol. vi. 



(24) Busby's Catechism of Music (rev.), vol. vi. 



(25) Geometry without Axioms (rev.), vol. vii. 



(26) Ritchie's Principles of Geometry (rev.), vol. vii. 



(27) Elementary Works by M. Quetelet (rev.), vol. vii. 



(28) Cambridge Differential Notation, vol. viii. 



(29) Gravitation, Airy's article, Penny Cyclop, (rev.), 



vol. viii. 



(30) Peacock's Treatise on Algebra (rev.), vol. ix. 



(31) Peacock's Treatise on Algebra, No. 2, vol. ix. 



(32) Progress of Physical Science, vol. x. 



(33) Ecole Polytechnique, vol. x. 



MEMOIRS IN THE CAMBRIDGE PHILOSOPHICAL TRANSACTIONS. 



(1) On the General Equation of Curves of the Second Degree, 



read Nov. 15, 1830. 



(2) On the General Equation of Surfaces of the Second Degree, 



read Nov. 12, 1832. 



(3) Sketch of a Method of introducing Discontinuous Con- 



stants into the Arithmetical Expressions for Infinite 

 Series, where they admit of several values, read May 16, 

 1836. 



(4) On a Question in the Theory of Probabilities, read Feb. 1837. 



(5) On the Foundations of Algebra, read Dec. 9, 1839. 



(6) On the Foundations of Algebra, No. 2, read Nov. 29, 1841. 



(7) On the Foundations of Algebra, No. 3, read Nov. 27, 1843. 



(8) On Divergent Series, and Points connected with them, 



read March 4, 1844. 



(9) On the Foundations of Algebra, No. 4, On Triple Algebra, 



read Oct. 24, 1844. 



(10) On Divergent Series, and on Various Points of Analysis 



connected with them, read 1844. 



(11) On a point connected with the Dispute between Keill and 



Leibnitz, read Jan. 1846. 



(12) On the Structure of the Syllogism, and on the application 



of the Theory of Probabilities to questions of Argument 

 and Authority, read Nov. 9, 1846. 



