522 INDEX. 



Page 



Henry, the mother of 54 



Henry, obsequies of 11 



Henry, parentage and date of birth of 54, 177, 427, 442 



Henry's administration of the Smithsonian Institution 274,409,435 



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



Henry's character 73,191,301^469 



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



Henry's first attraction to books 54,178 



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



Henry's personal appearance .. 189, 360 



Henry's researches on the radiation of sound - 346,465,500 



Henry's scientific papers, list of 365 



Henry's scientific work ~ 83, 209, 476 



Heliostat of simple form arranged by Henry 267 



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



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



Humphreys, Gen. Andrew A., a pall-bearer at the funeral of Joseph Henry 11 



Hydrometric experiment by Henry, on the separation of liquids 328 



Illuminants, investigation of, by Henry ~ 309, 313. 421, 502 



" Imponderables," theory 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 undertaken and published by the 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 scientific publications established by Henry 298 



Jenkin, Mr. observation by, on electric self-induction 240,494 



Jenkin, 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, 46fi 



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 149 



Letter 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 death 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 States, Henry, chairman of 69, 133, 314, 463 



Light-House Board of the United States, memorial proceedings of, on the death 



of Henry , 135 



Light-House establishment, services of Henry to 70,315,464,502 



