522 INDEX. 



Page 



Henry,— the mother of 54 



Henry,— obsequies of — 1^ 



Henry,— parentage and date of birth of. 64,177,427,442 



Henrys administration of the Smithsonian Institution 274,409,435 



Henry's ajstiietic perceptions 190, 333, 437, 471 



Henry's cliaractcr - 73, im, 3(il, 409 



Henry's early olcctro-magnet 84,131,218,444,483 



Henry's first attraction to boolcs 54,178 



Henry's first introduction to scientific literature 55, 167, 180, 207, 428, 443, 505 



Henry's personal appearance 180, 300 



Henry's researclies on tiio radiation of sound 340,405,000 



Henry's scientific papers,— list of 305 



Henry's scientific work '. 83, 209, 47C 



Heiiostat of simple form arranged by Henry 207 



Hodge, Rev. Charles,— death of, referred to by Dr. Parlcer 33 



Hodge, Rev. Charles,- prayer by, at tlie funeral services of Joseph Henry 13 



Humplireys, Gen. Andrew A., a pall-bearer at tlie funeral of Joseph Henry 11 



Hydrometric experiment by Henry, on tlie separation of liquids 328 



Iliumlnants,— investigation of, by Henry - ..309,313,421,502 



"Imponderables,"— tlieory of, controverted by Henry 322 



Increase of the Smithson fund during Henry's administration 48 



Index to scientific literature proposed by Henry 296 



Index to scientific literature undertalien and publislied by tlie Royal Society of 



London 297 



Induction, electrical, of successive orders, discovered by Henry 85,248,494 



Induction, Initial and terminal, investigated 251 



Information,— Henry's wide range of 332, 437, 471 



Intensity and quantity galvanic battery contrived by Henry 239 



" Intensity " and " quantity " galvanic currents considered 376 



Intensity and quantity magnets and batteries 84,226,429,483 



" Intensity " electro-magnet first produced by Henry __ -_223, 227, 448 



International exchanges of solontlflo publications established by Henry 298 



Jonkln, Mr.— observation by, on elootrio aelf-lnductton 240,404 



Jenkln, Prof. F.— remarks of, on the terms "Intensity" and "quantity" 377 



Joint resolution of Congress to have engraved and printed a portrait of Henry 



for the Memorial Volume 4 



Joule's testimony to Henry's original electro-magnetic engine 231 



Last days of Joseph Henry . 188,460 



Law, the domain of, recognized by Henry 334 



Letter from Dr. L. D. Gale, to Henry, on the telegraph of Prof. Morse 388 



Letter from Col. C. S. Hamilton, to the Light-House Board, on the success of 



their experiments 424 _ 



Letter from Henry to Rev. S. B. Dod 140 



liCtter from Henry to Prof. S. F. B. Morse 384 



Letter from Henry to Dr. E. Nott 409 



Letter from Henry to Mr. J. Patterson , 23 



Letter of condolence from the Trinity House, London 137 



Letter of Prof. James Hall, on the deatli of Henry 129 



Library scheme,— struggles of, for control of the Smithson endowment 281,410,457 



Light-House Board of England,— memorial from 137 



Light-House Board of France,— testimonial from ^ 308 



Light-House Board of the United Status,— Henry, chairman of. 69,133,314,403 



IJght-Houso Board of the United States,— memorial proceedings of, on the death 



of Henry . 135 



Light-House establishment,- services of Henry to 70, 3J6, 404, 502 



