HEN 
Heating houses by furnaces below, 
some important precautions, XXXIV, 
84. 
Heavy spar, of Berlin, Ct., analysis 
of, G. T. Bowen, iv, 325. 
, localities of, in Canada, vill, 
: , in Carolina, ii, 43 v, 
257. 
SS in Connecticut, ate 
ii, B73 5 i iv, 325; v, 40, 426, 254) 
vi, 211. 
; , in Massachusetts, i, 
115; vi, 211. 
, in New Jersey, xxxvi, 
—_—— 
9 
103. 
—_—— 
i , in New York, i, 287 ; 
ii, 178; 868; v, 28; vu, 56; vill, 
249 ; xxv, 346; xxvil, 364; xxvill, 
175. 
—— 
9 
, in Tennessee, 1, 638. 
——, in Virginia, i, 63. 
. , in Sicily, vil, 205. 
Hebrew words, orthography of, J. 
W. Gibbs, xxiv, 87. 
Heckewelder, John, labors of, XXXl, 
64, 66. 
Height, on the measurement of, by 
boiling water, xxxvii, 19. 
, mean, of the continents above 
the sea, xlix, 397. 
of Lake Erie and various 
places in western New York, C. 
Dewey, xxxiii, 122. 
of places in Ohio, Michigan, 
Pennsylvania and New York, C| 
Whittlesey, xlv, 12. 
in Wisconsin, 
Lapham, xlvi, 258. 
Hematite, see Iron Ore. 
Hemlock, reaction of sulphuric with 
the essential oil of, xxxvii, 246. 
Hemming’s safety tube, J. W. 
Webster, xxxvil, 104. 
Hemorrhage, remedy for, v, 409. 
Hemp, Manilla, account of ‘sl 200. 
Hemprich and Ehrenberg, notice of 
journey by, in Northern Africa, 
vii, 195. 
—— 
? 
LAS 
120 
HER 
\Henry, fo. electro-magnet, large, 
xix, 408.f : 
,electro-magnetic experiments, 
by, xxu, 403. 
: apparatus, application 
of galvanic multiplier to, xix, 
400.f 
, remarks in con- 
R. Hare, xx, 143. 
| » magnetism, production of 
currents of electricity and sparks 
from, xxii, 403. 
, Magnetic attraction and re- 
pulsion, reciprocating motion of, 
xx, 340.f 
; needle,disturbance dur- 
ing an Aurora, xxii, 143. 
, soap-bubble, experiments 
with, on molecular attraction, 
xlviil, 215. 
, spark from a long conductor 
in a galvanic battery, xxvill, 827. 
» spiral conductor, action of, 
Xxviil, 329. 
Henry, W., on the disinfecting 
powersof increased temperatures, 
Oly GHP) Peocordiigy IMILITOS 
, philosophical character of 
Priestley, xxiv, 28. 
Hentz, N. M., on North American 
spiders, xxi, 99.f 
, a new subgenus of spiders, 
xli, 116.f 
Hepatic blende, xlii, 387. 
Herbaria, European, notices of, xl,1. 
Herculaneum manuscripts, 11, 340. 
Herrick, E. C., Argulus catostomi, 
description of, xxxi, 297.! 
, Aurora Borealis, in summer, 
with abstract of Huxham’s auro- 
ral register, xxxill, 297. 
; ——, February,1837, 
Xxxil, 396. 
9 3 
xxxill, 144. 
July, 1887, 
: , ibid, needle agi- 
tated during, xxx, 146. 
‘ , Nov. 14, 18387, 
Henry, J., electro-dynamic induc- 
tion, SKY 209f ; xli, 117.4 
influence of, on the magnetic 
needle, xxxiv, 270. 
femalionen ‘J. W. Webster and~ — 
