Jou 
Jackson, C. T., on the geology of 
Maine and the public lands, re- 
view of, xxxvi, 143. 
, on geological specimens and 
surveys, xxx, 203. 
, notice of some metamorphic 
rocks. in New Hampshire, xlv, 
145. 
, organic matters in soils, xlv, 
337. 
Jacobi, on electro-magnetism as a 
moving power, xl, 339. 
Jameson’s Mineralogy, announced, 
ii, 167. 
Jarman, T., on gas lights, iii, 170. 
Jasper in Canada, vill, 64. 
in Connecticut, v, 36. 
in Massachusetts, 1, 113, 348. 
in Mississippi valley, iii, 71. 
in New Jersey, ii, 197. 
in North Carolina, v, 261. 
Jaundice, use of phosphoric acid in,) 
iv, 162. 
Java, native sulphur of, i, 58. 
, sulphuric acid of, i, 58. 
Jeffersonite, analysis of, v, 402. 
, identity of, with pyroxene, 
H, Seybert, vii, 145. 
Jenyns, L., notice of the works of, 
xxxvil, 165. 
Jewelry, composition of the powder 
used in giving the fine color to 
gold, xi, 188. 
Johnson, E. F., canal surveys in 
the state of New York, xxiv, 
19.f 
, on the height of the moun- 
tains of New York, xxxvii, 84. 
, on the present mode of con- 
ducting land surveys in the U. 
States, xix, 131. 
——, on the epicycloid, xxi, 280.f 
Johnson, S. L., ascent of Mt. Etna, 
xxvi, 1. 
Johnson, W. R., economy of fuel, 
| 
135 
in its domestic applications, xxiii, 
318.f 
, electricity, experiments in, 
RKVs Dee 
, heating power of various 
coals, xlix, 166, 310. 
JO8 
Johnson, W. R., heat and vapor, 
inquiries respecting, xxi, 304. 
, method of determining and 
calculating the specific heats of 
certain solids, xxvii, 267. 
, huaco a remedy for hydro- 
phobia, xxiv, 279, 388. 
, confirmatory notice of the 
medical virtues of guaco, xxvVil, 
Wale 
, iron from the Adirondack 
iron works, experiments on two 
varieties, xxxvi, 94.f 
, iron ore and coal of Pennsyl- 
vania, analyses of, xxxvill, 382. 
——,on the coal field of Carbon 
creek, xxxix, 137. 
, 1ron spikes, experiments on 
the adhesion of, in different kinds 
of timber, xxxii, 34.f 
, rotascope, description 
xxi, 265.f 
, rotation of liquids of different 
specific gravities, placed upon 
each other, xxvii, 84.f 
, on the rapid production of 
steam in contact with metals high- 
ly heated, xix, 292; xx, 308, 
418. 
, action between water and hot 
iron, xxi, 71.f 
, description of a steam py- 
rometer, xxii, 96.f 
, the strength of cylindrical 
steam boilers, xxiii, 68. 
, Notice of an ancient Ameri- 
can utensil, xxiii, 65.f 
Johnston, J., improved air pump, 
xxxiv, 86.f 
, apparatus for solidifying car- 
bonic acid, xxxvill, 297!; xlii, 
203. 
, new crystals of beryl, from 
Middletown, xl, 401.f 
, on a large crystal of colum- 
bite from Middletown, Ct., xxx, 
387.f 
, sketch of the early history of 
Count Rumford, xxxili, 21. 
, on shrinkage marks in sand- 
stone, xlv, 315. 
of, 
