INDEX. 523 



Page 



Light-House illumination,— Henry's investigations in 97, 30 >, H2 121,502 



Light-House service greatly improved by Henry 97,308, 315, 136 



I htning-rods, observations on 261 



Lightning-rods suggested for telegraph poles 262 



Liquid cohesion found to be equal to solid cohesion _■ 



List of Henry's scientific papers 



Longitude determination by simultaneous observations on meteors 271 



Loss of valuable scientific papers by lire, in 1865 : 05 



Lovering, Prof. Joseph,— obituary memoir of Henry, by 127 



Mel losh, Rev. Dr. J., appointed by the Regents to offer introductory prayer at the 



Memorial Services 29 



McCosh, Rev. Dr. J.— opening prayer by, at Memorial Services . 39 



Maclean, Dr. John,— account by, of Henry's eleetion to Princeton Li 



Maclean, Dr. John, one of executive committee appointed by the Regents to 



make arrangements for a public commemoration 1,28 



Maclean, Dr. John, one of a select committee appointed by the Regents to pre- 

 pare a biographical sketch of Henry 28 



Ma. -Iran, Dr. John, — prayer offered by, at meeting of the Regents, "ii the death 



i.i Joseph Henry 27 



Maclean, Dr. John,— resolution of thanks presented by, at meeting of the 



Regents 34 



Maclean, Dr. John,— resolution presented by, at meeting of the Regents, rela- 

 tive to preparation of a Memorial Volume 31 



Magnet, Henry's Albany, of 750 pounds, made in 1830, for the Academy 220 



Magnet, Henry's New Haven, of 2,300 pounds, made in 1831, for Yale » )ollege 22 I 



Magnet, Henry's Princeton, of 3,500 pounds, made in 1835, for the College oi 



X«'\v Jersey -i i. 484 



Magnet, Intensity, for acting at a distance, made by Henry in 1830 223,227,488 



Magnetic expansion of iron tested by Henry 329 



Magnetic needle by galvanism, first produced by Arago _i ■ 179 



Magnetic telegraph first made possible by Henry 93, 2: tSG 



Magnetic telegraph invented by Henry 85, 131, 14'.', 228,380, 1-7 



Magnetism, by means of a galvanic current, first developed by Arago _. 21 3, i~ i > 



Ma-_' net ism, terrestrial,— observations by Henry on the intensity of. 258,445 



Magnetizing " bobbin " first devised by Henry 217 



Magneto-electricity first attempted by Fresnel in 1820 233 



Magneto-electricity first discovered by Faraday in 1831 234, J-t*; 



Magneto-electricity independently discovered by Henry early in 1832 61,2 15, l!"., 4 1 " 1 193 



Marriage of Joseph Henry to Miss Alexander 61, 2 > 



Mathematics,— attainments of Henry in 208,443 



Mathematics,— Henry, professor of, at Albany Academy 57, 130, 211 



Meads, Dr. O. — account by, of Henry's early experiments 375 



Meads, I >r. < K— memorial minute by. on the death of Henry 130 



Meads, Dr. O.— testimony of, to Henry's early magnetic telegraph 131,380 



Medal, * lopley, proposed for Henry, by Faraday and Wheat stone ."'in'- 



Memorial minute for the Albany Institute, by Dr. Orlando Meads 130 



Memorial Services appointed by < '> ingress, to be held in the Hal I of the House of 



Representatives, United States < 'apitol 37 



Memorial Services at the Capitol,— arrangements for 29 



Memorial Services at the < 'apitol, held on the evening of January 16, 1879 I - 



Memorial tribute to A. Dallas Bache, by Henry 330 



Memorial Volume in honor of Joseph Henry, directed by the Regents 31 



Memorial Volume in honor of Joseph Henry,— the printing of l">, I copies of, 



ordered by ' 'on*_rress 4 



Memoir of Henry by Prof. Henry < '. Cameron 166 



Memoir of Henry by Rev. Samuel B. Dod 139 



Memoir of Henry by Prof. Asa < Iray 53 



