636 
Machines, application of electro-mag- 
netism to the movement of, 503. 
Magnet, laws according to which it acts 
on a spiral, 608 ; electromotive power 
of, 610. 
———,, (Antinori and Biot), on the elec- 
trical phenomena produced by, 608, 
621. 
Magnetic power produced by voltaic ap- 
paratus, 511. 
Magnetism, active force produced by, 
508 ; application of, as a moving power, 
547; mechanical effect of, 507. 
Magnets, electro-, lifting power of, 503. 
Mammalia, intestinal worms in the feetus 
of, 558. 
Materialists, Carus’s representation of 
their views respecting life, 252. 
Mathematical theory of heat, 122. 
Matter, constitution of, 490; elementary 
particles of, 490. 
, organic, origin of, 555, 
Meadow-sweet, essential oil of, 153. 
Melloni on the transmission of radiant 
heat, 1. 
, on the polarization of heat, 325. 
——,, on the reflection of radiant heat, 
383. 
—, on the identity of the agents pro- 
ducing light and heat, 388. 
Melolontha of Aristophanes, Aristotle, 
and Pliny, 193, 195. 
Mercury, oxydization of, 509. 
Metal, vibrations of the laminz of, 139. 
Metallic colours, 105. 
oxides, crystallization of, 414; 
formation of, 420. 
Metallochromy, 95. 
Metals, action of fire on, 108; new me- 
thod of colcuring, 94. 
, classification of,according to their 
electrical properties, 621 ; experiments 
of Lenz on, 621,622; Faraday on, 623. 
Metamorphosis of destroyed organic sub- 
stances into elementary forms of life, 
560. 
Micheli’s experiments on the germination 
of the seeds of fungi and mould, 556. 
Microglena monadina, eyes of, 574. 
volvocina, fiery ring round, 575. 
Microscope, Amici’s, 570, 580, 581 ; Che- 
valier’s, 561, 580; Pistor and Schiek’s, 
581; Hoffmann’s, 560; Bleuler’s, 560; 
Plosl’s, 571. 
Microscopes, ultimate power of, 576. 
Milne Edwards, organic atoms, 571. 
Mind, analogy between the laws of, and 
the phenomena of nature, 223. 
Mitscherlich on the dilation of crystals, 33. 
Mole cricket, devastation caused by, 199. 
INDEX. 
Molecules, active, Brown on, 570. 
,gradual origin of organic beings 
from, 562. 
, material, figure of, 459; den- 
sity of, 463. 
, organic, Ehrenberg on, 555; 
proximate finity of, 575; organic, per- 
fect organization of, 557. 
Moll, van, experiments onelectricity, 534. 
Monas Termo, size of, 573; coloured in- 
ternal sacs of, 573. 
pulvisculus, motion of, not effected 
by a change of gravity, 559; cilia of, 
559; fringe of cilia of, 573 ; membra- 
naceous sacs, 574, 
Monas atonius, experiments on, 575. 
Mossotti on the forces which regulate the 
internal constitution of bodies, 448. 
Motion, molecular, influence of, 526. 
Motion of heat, 125; in the interior of 
the earth, 134. 
Mould, cyclical development of, 557; 
experiments of Ehrenberg on, 555; 
germination of the seeds of, 556, 
Munke’s microscopical observations, 571. 
Nature, division of, 228; kingdoms of, 
Dr. Carus on, 565. 
, represented by Carus as one in- 
finite life, in which no proper death is 
conceivable, but merely the merging of 
a single form in the universal life, 225. 
Naviculz, description of, 401. 
Newton’s elementary particles of coleurs, 
569, 580; experiments on colours, 99. 
Nitric acid, mode of ascertaining the pre- 
sence of, 441. 
Nobili’s chromatic scale, 120. 
theory of electro-dynamic induc- 
tion, 528; double needle, 608, 609; 
method of exciting the electric cur- 
rent, 609. 
Oersted’s discovery, 508, 504. 
Ohm on ‘the galvanic battery, 312; his 
galvanic chain, 511. 
Organic life, its connection with inorganic, 
232. 
Organisms, or organic bodies, 226; how 
distinguished from inorganic, 227, 242. 
Organized matter, its production from 
unorganized, 246, 233. : 
Oscillations, Biot’s experiments on, 513. 
Oscillatory beings, between animal and 
plant, 232, 246. 
Osseous system, development of, 249. 
Ostrogradsky on the equilibrium of in- 
compressible fluids, 548. 
Oxychloride, double, analysis of, 431. 
Oxides, metallic, crystallization of, 414. 
Pander’s experiments on circulation in 
the egg, 251. 
