THE 



CABINET CYCLOPEDIA. 



CONDUCTED BY THE 



REV. DIONYSIUS LARDNER, LL.D. F.R.S. L.& E. 



M.R.I.A. F.R.A.S. F.L.S. F.Z.S. Hon. F.C.P.S. &c. &c. 



ASSISTED BY 



EMINENT LITERARY AND SCIENTIFIC MEN. 



AN 



ESSAY ON PROBABILITIES, 



AND ON THEIR APPLICATION TO 



LIFE CONTINGENCIES AND INSURANCE OFFICES. 



BY 



AUGUSTUS DE MORGAN, 

 i> 



OF TRINITY COLLEGE, CAMBRIDGE; 



PROFESSOR OF MATHEMATICS IN UNIVERSITY COLLEGE, AND 

 SECRETARY OF THE ROYAL ASTRONOMICAL SOCIETY. 



LONDON: 



PRINTED FOR 



LONGMAN, ORME, BROWN, GREEN, & LONGMANS, 



PATERNOSTER-ROW ; 



AND JOHN TAYLOR, 



UPPER COWER STREET. 



1838. 



