INDEX OF VOLUMES I TO XX. 143 



VOL. PAGE 



Illusions. James Sully. (International Scientific Series.) xix 559 



Imaginary Quantities. M. R. Argand xix 420 



Immortality. Josie Oppenheim xi 503 



Physical Basis of. A. B. Blackwell ix 372 



Implements, Weapons, and Ornaments of Great Britain and Ireland, An- 

 cient Bronze. John Evans xx 127 



Index Medicus. (Monthly.) Edited by J. S. Billings xv 278 



to Publications of the United States Naval Observatory (1845-1875). 



E. S. Ilolden xvii 276 



Indian Question, The. General Pope xiv 542 



Territory, Military Map of the. E. H. Ruffner ix 116 



Indiana, First Annual Report of the Department of Statistics, etc. 



(1879) xvii 852 



Indians, Former and Present Number of our. Errors respecting North 



American. G. Mallery xiv 117 



Indigestion, Biliousness, and Gout. J. M. Fothergill xix 857 



Industrial Conciliation in New York, Ohio, and Pennsylvania. J. D. 



"Weeks xix 420 



News and Inventor's Guide. Edited by 0. B. Norton xvi 856 



Industry, Primitive. C. C. Abbott xx 133 



Inebriate ? Wbat shall we do with the. T. D. Crothers xx 132 



Infectious Diseases, Physics of the. 0. A. Logan xiii 756 



Inheritance, Law of, on the Philosophy of Breeding. E. Lewis Sturtevant. vii 373 



Insanity and Disease. L. A. Tourtellot vi 507 



in Ancient and Modern Life. D. H. Tuke xiii 376 



The Problems of. George M. Beard xvii 565 



Insects, Devonian, of New Brunswick. S. H. Scudder xix 123 



Half-Hours with. A. S. Packard, Jr viii 245 



Noxious and Beneficial, Report on. C. V. Riley. . hi 518 ; vii 375 ; 



ix 761 ; xii 373 



of Illinois, Report on the. C. Thomas xv 711 ; xx 413 



On xviii 850 



of the Garden. A. S. Packard iv 755 



Orange. W. H. Ashmead xix 123 



Origin and Metamorphoses of. Sir J. Lubbock iv 628 



Our Common A. S. Packard iv 247 



Instinct. P. A. Chadbourne i 117 



Insurance, Life. Elizur Wright v 118 



Intelligence, On. H. Taine iv 629 



International Review iv 500 



Scientific Series iii 648 ; vii 244 



Interoceanic Canal and the Monroe Doctrine xvii 127 



Invertebrata, Anatomy of the. C. T. H. von Siebold v 502 



Invertebrate Fossils collected in 1871, 1872, and 1873, Preliminary Re- 

 port on. C. A. White vii 119 



Iron and Steel Construction. J. J. Weyrauch xi 630 



Iron-Ores, Metallurgic Properties of Missouri. A. Schmidt vi 629 



Iroquois, League of the. B. Hathaway xx 707 



Isopoda of New England and Adjacent Waters, Report on the Marine. 



O. Harger xix 126 



Israelites, Eminent, of the Nineteenth Century. H. S. Morais xviii 136 



