406 MEMOIR OF AUGUSTUS DE MORGAN. 



1845. On the Ecclesiastical Calendar Easter. 



1846. On the earliest printed Almanacs. 



1847. Recurrence of Eclipses and Full Moon. 



1848. On Decimal Coinage. 



1849. Short Supplementary on the First Six Books of Euclid's 



Elements. 



1850. On Ancient and Modern Usage in Reckoning. 



1851. On some points in the History of Arithmetic. 



1852. A Short Account of some recent Discoveries in England 



and Germany, relative to the Controversy on the Inven- 

 tion of Fluxions. 



(See Life of Newton in Knight's ' British Worthies/ 

 Arts. Commercium 'Epistolicum and Fluxions, P. Cyc., 

 Dispute between Keill and Leibnitz, Cambridge Memoirs.) 



1853. On the difficulty of correct descriptions of Books. 



1854. On a Decimal Coinage. 



1855. The Progress of the Doctrine of the Earth's Motion between 



the times of Copernicus and Galileo, being notes on the 

 Ante-Galilean Copernicans. 



1856. Notes on the History of the English Coinage. 



1857. Notes on the State of the Decimal Coinage Question. 



IN SMITH'S CLASSICAL DICTIONARY. 



Diophantus. Sosi genes. 



Eucleides. Theon. 



Heron. Ptolomseus. 

 Hipparchus. 



TRACTS PUBLISHED BY THE SOCIETY FOR THE DIFFUSION OF 

 USEFUL KNOWLEDGE. 



(1) Study and Difficulties of Mathematics, vol. i., 1836. 



(2) Arithmetic and Algebra, 1831, vol. i., 1836. 



(3) Examples of the Processes of Arithmetic and Algebra, vol. i., 



1836. 



DUBLIN REVIEW. 



Laplace on Probabilities, No. 1, April 1837. 

 Laplace on Probabilities, No. 2, July 1837. 

 On Legislation for Life Assurance, Aug. 1840. 

 Review of Jones on the value of Annuities (published by 

 Diffusion Society), August 1841. 



