FP. 
Pachuca silver mines, xxiv, 231. 
Pacific, Caroline Islands, some ac- 
count of, xxvill, 115. 
, currents of, xxv, 131 5 xlv,299. 
Packfong, composition of, xv, 396. 
Paddle fish, Ohio, xii, 201. f 
Paddle wheel and screw, propulsion 
of vessels by, xlu, 336. 
Padua, v, 177. 
Peestura, on the stone of which the 
temple of, is built, xxxvii, 366. 
Page, C. G., movements on the 
surface of water produced by the 
vibration of glass, xxx, 192, 
, echo in Virginia, xxxvi, 174. 
, new electrical instruments, 
xxvi, 110.£ 
, method of increasing shocks, 
with J. [lenry’s apparatus for, 
obtaining spar ks and shocks from 
the calorimotor, xxxi, 1387.£ 
, iron, lead and other metals, 
a substitute for copper in galvan- 
ic apparatus, xxxil, 19'7. 
, on the use of the dynamic; 
multiplier, xxii, 854.! 
. Musical tones from magnets, 
xxxii, 396 3 xxxiil, 118; xlviti,40l. 
, electro-magnetic apparatus 
and experiments, xxxiii, 190.! 
; experiments on 
the application of electro-magnet- 
ism as a moving power, XXxXill, 
118, 190°; xxxv, 106. 
» rotary multiplier, or astatic 
gulvanometer, xxxiii, 3876.f 
, new form of electrepeter, 
xxxiil, 877.£ 
» new magnetic electrical ma- 
chine of ereat power, with two 
parallel horse-shoe magnets and 
two straight rotating armatures, 
with experimental researches, 
xxxiv, 163.£ 
, ibid, fusion of iron filings by, 
xxxiv, 169. 
—-,compound electro-magnets for 
the magnetic electrical spark shock 
and decomposition, xxxiv, 364. 
192 
PaAt 
Page, C.G., magneto-electric multi- 
plier convertible into an electro- 
magnetic engine, xxxiv, 368.f 
» Magneto-electric and electro- 
magnetic apparatus, xxxv, 252.! 
» magnetic electrepeter and 
electrotome to be used with flat 
spirals, xxxv, 112.f 
, compound  electro-magnet 
and electrotome, xxxv, 253.! 
-, circular galvanometers, Xxxv, 
259.f 
, revolving armature machine, 
xxxv, 262/; xxxvi, 850.f 
» reciprocating armature en- 
gine, xxxv, 263.! 
; vibrating armature engine, 
xxxv, 267.f 
, double helix for inducing 
magnetism, xxxv, 261.f 
, on the benefit of fresh im- 
mersion in galvanic batteries, 
xxxvi, 187.f 
, the galvanoscope, a means of 
detecting the failure of water in 
steam boilers, xxxvi, 141.f 
, observations on electricity, 
XXXVI, 800. 
, magneto-electric multiplier, 
xxxvii, 275.f 
, an improved form of Saxton’s 
magneto-electric machine, xlvill, 
392. 
, new electro-magnetic ma- 
chine, xlix, 131.f 
, new axial galvanometer, xlix, 
136.f 
, double axial 
engine, xlix, 139.f 
, entomological cabinet of, for 
sale, xxxix, 211. 
, mode of preserving Lepidop- 
tera, xlvil, 131. 
Paine, M., Medical Commentaries, 
notice of, xxxix, 209. 
Paine, R. T., on barometric mini- 
ma of Feb. 16-19, 1842, xlii,403. 
,on the solar eclipse of July 
8, 1842, xlii, 1'75. 
Paint, fine scarlet, for the pallet, 
xvi, 174, 
reciprocating 
