EE 
Electro-magnetic apparatus, C. G, 
Page, compound electro-magnet, 
xxxv, 293.f 
—— - —— ——, ——, electro- 
tome, xxxv, 112, 253.f 
—— -—— ——, » Yrecipro- 
cating armature engine, xxxv, 
263.6 
-—— ——, ——, with 
brating armature, xxxv, 267.f 
—— --—— ——, ——, circular 
9 
galvanometers, xxxv, 259f;— 
with double helix for inducing 
magnetism, xxxv, 261.f 
- : , electre- 
peter, new form of, xxxiii, 877f; 
xoxvenl 12s 
—, W. H. Pepys, 
vil, 195. 
-—— — , MW. Pivii, xxiv, 
144, 146f, 196. 
,J. B. Zabriskie, 
model of engine, xxxii, 313.f 
, rotating, 
z ? 
xxxvi, 129.f 
currents, A. de la Rive, 
xxxly, 6. 
-— disc of Arago, xxiv, 
143. 
dynamic. 
induction, see Electro- 
and magneto-electric 
formula, xxxv, 356.f 
properties of metallif- 
erous veins, R. Fox, xx, 
136. 
telegraph, S. F. B. 
Morse’s, xxxiii, 185.f 
, see farther, Mag- 
neto-electric. 
Electro-magnetism, early experi- 
ments in, lil, 883; v, 391. 
, experiments in, J. H. 
Abbot, xl, 104.f 
, J. P. Emmet’s discov- 
eries (magneto-electric) in, xxiv, 
78; xxvi, 311; xxviii, 331. 
-——, ——, on the cause of 
voltaic currents in, xxvi, 23.f 
, R. Hare’s  experi- 
ments, vill, 145. 
79 
Vi- 
ELE 
Electro-magnetism, R. Hare’s ex- 
periments, in confirmation of 
Henry’s, xx, 148. 
, M. Jacobi on, asa 
moving power, xl, 339. 
‘ , ibid, laws of, xl, 
340. 
, G. Moll’s experiments 
In, xix, 329. 
experiments to 
determine how far galvanic sur- 
faces could be diminished and 
retain magnetic power, xxvi, 177. 
, C. G. Page’s experi- 
ments on the application of, as a 
moving power, xxxiil, 118, 190f; 
xxxv, 106. 
, M. Pixii’s experiments 
in, xxiv, 144, 146f, 196. 
»J. B. Zabriskie, on 
the induction of metallic coils, 
xxxii, 308.f 
Electrometers, iii, 372. 
Electrometer, single leaf, R. Hare, 
vii, 851£; viii, 99; xxv, 136.f 
Electromotors, S. Dal Negro, xxvii, 
189. 
, hew property of elementary, 
S. Dal Negro, xxv, 193. 
Klectrography, gilding by, xli, 402. 
, v. Kobell on, xlix, 221. 
Electroscope, R. Hare, xxv, 136.f 
Electrotome, C. G. Page, xxxv, 
112f, 253.f 
Electrotype, account of, T. Spencer, 
xl, 157.f 
Elephant, death of, iv, 393. 
of Siberia, xxvil, 353. 
, fossil, near Bloomfield, Ohio, 
xxv, 256. 
; , Jackson Co., 
xxxiv, 358f, 363.f 
5 remains, 
Creek, xxxil, 377. 
bones and Mylodon (?) from 
Oregon, H. C. Perkins, xii, 
136.£ 
Ohio, 
Trondiquot 
, from near Beering’s 
Straits, xvi, 382. 
tooth, from near the shores of 
Lake Erie, xiv, 31. 
