MIC 
Mica, in New Hampshire, v, 40; 
XVIl, 07. 
-—, in New Jersey, v, 246; vi, 
250. 
, In New York, iv,.37; v, 29; 
1x, 40, 2515; xxi, 326. 
, in Pennsylvania, ix, 45; xiv, 
Sys: 
, In Virginia, v, 257. 
slate, association with granite, 
in Massachusetts, and relative 
age, vi, 4. 
-——, varieties in the Con- 
necticut valley, vi, 22. 
, minerals of, vi, 24. 
——, in western Massachu- 
setts, vill, 6, 2490. 
——, relation to gneiss, vill, 
6. 
—— -——.,conglomerated,in Wind- 
sor, Mass., vill, 7. 
—— ——, contorted, vill, 253. 
——_ ——, minerals of, vii, 7. 
, alternations with gran- 
ular limestone, ii, 2113 viii, 15, 
240, 252. 
containing rounded peb- 
bles of quartz, in Massachusetts, 
vil, 244. 
Mice, habits of, xlvi, 242. 
Michaux, André, notice of, A. 
Gray, xlii, 2. 
——, notice of his botanical labors, 
ix, 266. 
, the younger, notice of, xlii, 10. 
Michigan, notice of the peninsula) 
of, in relation to its topography, 
scenery, agriculture, population, 
resources and productions, J. 
Pierce, x, 304. 
, Indians of, J. Pierce, x, 313. 
, rocks of, xl, 136. 
, mining region of, D. Hough- 
ton, xli, 183. 
-—., Geological Reports on, of D.| 
Houghton, noticed, xxxiv, 190; 
xl, 136. 
, geological and mineralogical, 
observations on the northwest por- 
165 
tion of Lake Huron; J. I. Bigs- 
by, iii, 254.1 
21 
MIL 
Michigan, geological and mineral- 
ogical observations of the region 
about Fort Winnebago, D. Rug- 
gles, xxx, 1f 
, hative copper and ores of, D. 
Houghton, xii, 185; xlv, 331, 
332. 
» —— — ibid, D. Ruggles, 
xlix, 64.f 
F ,of Lake Su- 
perior, H. R. Schoolcraft, iii, 
2016, 
‘ and silver, of 
Kewenaw Point, C. T. Jackson, 
xlix, 81. 
, Lake, height of, xlv, 16; xlvi, 
259, 260. 
Microlite, C. U. Shepard, xxvii, 
861; xxxii, 338; xiii, 116; 
xlviil, 176. 
, identical with pyrochlore, J. 
E. Teschemacher and A. A. 
Hayes, xliii, 33. 
——, reply to, ibid, by C. U. Shep- 
ard, xliti, 116; xlviil, 176. 
, analysis of, A. A. Hayes, xlvi, 
158. 
Micrometers, artificial spider’s web 
for, xv, 1838. 
Microscope, on improvements in, 
E.. Thomas, xix, 57.‘ 
, on the achromatic, E. Thom- 
as, xx, 265.f 
, monochromatic Jamp of D. 
Brewster for, vii, 3638. 
and microscopical observa- 
tions, notice of, xli, 205. 
Microscopic life, see Infusoria, and 
Zoology. 
Migration of birds, note on, x, 
192. 
of North America, J. 
Bachman, xxx, 81. 
Mildew, prevention of, ili, 385. 
Milk, mode of preserving indefi- 
nitely, xvili, 152. 
, use of, in dropsy, xxiv, 
209. 
, facts from Barruel respect- 
ing the milk sold in Paris, xvii, 
378. 
