158 
77. A New Vertical Lantern Galvanometer. G. /. Barker..... xiv, 440 
78. Effect of Magnetic and Galvanic Forces on Iron and Steel. 
CMG CRESS. a casera svi dcaajateyatmete hs iste shasta aatete xvi, 603 
79. Theory of Magnetic Declination.  Frazer..... ni eistelshaieieters xvi, 642 
So;ielesraphic Overtones: | 20/7226 amet steinieicicion etenieate XVill, 39 
81. Electrolytic Estimation of Cadmium, 2. F#. Smith........ xviil, 46 
82. Circumstances Influencing the Efficiency of Dynamo-electric 
Machines. £. Thomson and £. F. Houston....e.ceees xviii, 58 
$3) Obituanysof Joseph) Elenty. sa Comensmerertelsarcietelaiete eee xviii, 461 
84. The Aurora of April 19, 1882. A. C. Lewis...... leo e-alela'a's ) Ry Seems 
85. New Standard Cell. G. 7. Barker....... solos a/eiavs syetnale eet EX GROSSMOAG 
86. Effects of a Secondary Battery. Russell Thayer....... Seah XX, 639 
87. On the Synchronous Multiplex Telegraph. Lawin $. Hous- 
LOM i.e lavdiis's skieie ca AIN'T eke Sen Hie eae NR RT te Ste We xxi, 307, 326 
88. Photography by a Lightning Flash. Ldwin F. Houston .....xxiii, 257, 318 
89. Ona Non-magnetizable Watch. LZdwin $. Houston........ xxiv, 418 
go. Electrolysis of Lead Solutions. Adgar F. Smith........05 xxiv, 428 
gt. Muscular Contractions Following Death by Electricity. Zd- 
LUZIEN J NLL OUSLOT 1, ais asa) soe A OMG RTO ORCL xxviii, 36 
92. Scientific Work of Benjamin Franklin. ¥% W. Holland..... XXvlil, 199 
93. The Electrolysis of Metallic Formates. ZH. S. Warwick..... Xxix, 103 
Mr. Wharton next addressed the Society as follows: 
Gentlemen :—A few years ago it was not known that any other 
substance but iron possessed the power of acquiring permanent 
magnetism, though it was of course known that nickel and cobalt 
were magnetic metals. The fact that they themselves could be 
made into magnets was never known until I myself, with my own 
hands, hammered out the first magnetic needle that ever had been 
made of any other substance than steel, which I think was in the 
year 1874. I had after a short time several compasses constructed, 
furnished with needles made of nickel. One of them I sent to the 
Russian Government, one to the French Government, one to the 
British Government and one to our own, in order that they might 
be sent to sea and experimented with. The British Government 
and the American Government took no notice of it, but the Russian 
and French Governments investigated the subject very thoroughly 
and made reports on it. Lord Kelvin, then Sir William Thomp- 
son, investigated the properties of sheet nickel, I furnishing him a 
piece of sheet nickel with which he investigated the properties of 
