634 
Fungi, cyclical development of, 557; ex- 
periments of Ehrenberg on, 555 ; ger- 
mination of the seeds of, 556. 
Gaillonella distans, occurrence of, 403. 
ferruginea, description of, 402. 
Galvanic battery, Ohm’s theory on, 312. 
Galvanic chain, Ohm’s, 511. 
Gas, chlorous acid, properties of, 293. 
, lodic, spectrum of light of, 478. 
, propagation of sound in, 372. 
Gases, action of,494; aggregate condition 
of, 490; evaporation and secretion of, 
250; law of the diffusion of, 394. 
Gaza, the locust of Amos and Joel, 200. 
Generatio equivoca, critical examination 
of, 555. 
Geology, relation of infusoria to, 568. 
Glass, green, physical properties of, 335. 
, its optical action when heating and 
cooling, 85. 
, cooled, double refraction of, 78. 
, laminze of, vibrations of, 139. 
Glass molecules, absorptive force of, 44. 
Glasses, achromatic object, Selligue’s 
method of combining, 580. 
Geethe on metamorphoses of plants, 238. 
Gold, conductibility of, 322. 
——— dust, powerful reflection of, 579; 
transparency of, 579. 
— leaf, thickness of, 572. 
Gourjon’s thermomultipliers, description 
of, 70. 
Goureau’s experiments on sound, 381. 
Graminez, analysis of vegetation of, 584. 
Grape-sugar, optical phenomenon of, 596. 
Green glass, physical characters of, 335. 
Greenhouse Coccus, description of, 215. 
Gruithuisen, his views on infusoria, 232. 
on the formation of orga- 
nisms, 571. 
Gryllo-Talpa, devastation of, 199. 
Gum, property of, 587. 
Gyrotrope, action of, 534. 
Hare, calorimotor of, 515. 
Harpsichord, ocular, Caslet’s, 114. 
Hauy on the refractions of light, 372. 
Heat and light, identity of, 37; identity 
of the agents producing them, 388. 
Heat at the surface of a body, movement 
of, 127. 
Heat, differences between solar and ter- 
restrial, 69; influence of, 598; mathe- 
matical theory of, 122; maximum of 
in the solar spectrum, 37; method of 
measuring, 5; velocity of its propaga- 
tion, 7; molecular vibration of, 389; 
motive power of, 348; polarization of, 
325; propagation of, 24, 389; refran- 
gibility of, 392. 
, Tadiant, concentration of, 387 ; 
INDEX. 
laws of, 124 ; motion of, 125; distribu- 
tion of, 128, 131; reflection of, 283; 
transmission of, 1. 
Heat, solar, theory on, 137. 
Heavens, mechanism of, 451. 
Henry, experiments on electricity, 534. 
, on the influence of a spiral con- 
ductor, 540. 
Honey, the two principles of, 605. 
Hoffinann, microscope of, 560. 
Hornschuch’s views respecting the prima 
germina rerum, 571. 
Human egg, development of, 247. 
Hydotina senta, duration of life of, 567. 
Hydrate of lime, properties of, 270. 
Hydraulic wheels, construction of, 506. 
Hydrochloric acid, mode of ascertaining 
the presence of, 441. 
Hydrogen, action of, 426. 
Hydrospiroilic acid, composition of, 155. 
Hygrocrocis ochracea, 402. 
Hypochlorites, properties of, 305; pre- 
paration of, 305. 
Identity of the agents producing light and 
heat, theory of, 388. 
Indigo, its property of producing violet 
vapour, 596. 
Induction, electro-dynamic, theory on,528. 
, dynamical, 545. 
Infusoria, according to Koelle living glo- 
bules of Zymom, 570. 
Infusoria, coloured pouches of, 563; or- 
gaus of nutrition, 5638; generative or- 
gans of, 563; teeth of, 563; consum- 
ption of, 406; occurrence of, 402; Eh- 
renberg’s observations on, 559; gene- 
ratio equivoca of, 559; formation of, 
232; structure of, 560; fourfold mode 
of reproduction of, 564, 567; ventral 
cells of, 564; geographical diffusion of, 
565; man dependent on the will of, 
565; origin from eggs of, 566; high 
organization of, 561; cyclical develop- 
ment of, 561; nervous system of, 566; 
internal organs of, 567; division into 
classes, &c., 567; fertility of, 567; oc- 
tuple increase of, 568; influence of on 
organic substances, 568; how precipi- 
tated, 568; relation of togeology, 568; 
development of into other: different 
bodies, 571; formed of Zymom, 571; 
certain forms of, produced by certain 
infusions, 572; presence of infusorial 
eggs in plants, 572. 
, the larger animals considered as 
formed of a mass of them, 246. - 
—-——, fossil, occurrence of, 400. «= » 
Ingenhousz, on the green matter, 232, 
Insects, Walckenaer on, 167; names: of, 
and in ancient writers, 171. » 
