MAG 
Maclurite, analysis of, H. Seybert, 
vy, 336. 
, identical with chondrodite, v, 
366. 
, in New Jersey, v, 348. 
Madeira, notice of, xxiv, 238. 
, wines of, xxiv, 240. 
Meecenas, bust of, xxxiv, 51. 
Maerenhaut, J. A., on Otaheite, 
xxix, 283. 
Magendie, F., on the mechanism 
of absorption in animals, il, 
288. 
, on prussic acid, i, 81. 
Magic, natural, remarks on, xxxiil,|) 
258. 
Magnesia, effect of, on soil, 
159. 
, solubility of, v, 378. 
, in compact limestones, large 
proportion of, R. E. Rogers, xii, 
171. 
, carbonate of, of Staten Island, 
N. Y., 1, 142; v, 266. 
- , in Pennsylvania, 1,236 ; 
xiv, 18. 
, hydrate of, description and 
analysis of, iv, 245. 
, , in New Jersey, i, 55; 
iv, 1 sivy 267. 
, in Hoboken, 1, 54; iv, 
Sdlile 
y) 
17; vii, 370. 
——, ——-, from Shetland, vii, 
"865. 
, nitrate of, i, 133. 
xv, 241. 
‘ , native in New York 
State, xv, 241]. 
and soda, sulphate of, xlviii, 
189. 
Magnesian carbonate of lime, in N. 
York, analyses of, L. C. Beck, 
xlvi, 34. 
hydrate of silica, Harford Co., 
Md., P. T. Tyson, xviii, 79. 
, identity of, with 
Deweylite, C. U. Shepard, xviii, 
81. 
pseudomorphs, and metamor- 
phic changes, xlviii, 89. 
19 
, sulphate of, 1, 1835 11, 375;) 
149 
MAG 
Magnesite, hard, from Baumgarten, 
Silesia, vii, 368. 
> in N. “Sone. Vv, 207; 
34, 
, In Maryland, xiv, 12. 
, in Pennsylvania, xiv, 9, 10. 
xlvi, 
‘Magnesium, notice of, xix, 197, 
379 ; xxvii, 196. 
, obtained by W. W. Mather, 
xx, 408. 
Magnets, cast iron, xxxiii, 265. 
, chemical action in needles 
suspended from, xviii, 402. 
, best position of, for mutual 
action, H. Lloyd, xxxviii, 96. 
, current produced by the ro- 
tation of, Piwvii, xxiv, 144, 146.£ 
, electric spark from, J. Henry, 
xxil, 4038. 
, a mode of producing sparks 
and galvanic currents from the 
horse’ shoe, J. P. Emmet, xxiv, 
78. 
, new method of making per- 
manent, xxxvi, 335.f 
: galvanic, construction OIE 
B. Zabriskie, xxxvi, 124.f 
, Henry’s large, xix, 
>) 
408.f 
, made for Laboratory 
of Wale Col llesetiax) 201: 
,—— Humbert Sse Xxx 
204. 
——, ——, Ganby’s, xxix, 354. 
——, ——, Page’s, xxxv, 253.f 
—, ——, E. M. Clarke’s, xxxiii, 
213.f 
» ——, see farther under Elec- 
tro-Magnetic and Magneto- Elec- 
tric. 
, musical tones from, C. G. 
Page, xxxii, 396; xxxili, 118; 
xlviti, 401. 
, cause of voltaic currents with 
J.P. Emmet, xxvi, 23.f 
, native, in Rhode Island, iv, 
285; v,402. 
Magnetic attraction and repulsion, 
law of, R. W. For, XXxvill, 570. 
—— ——,, reciprocating mo- 
tion of, J. Henry, xx, 340. ry 
? 
