ommutator, construction of, 504. 
Convolvulus of Cato and Pliny, 187. 
Copper, crystals of the protoxide of, 421; 
subnitrate of, 425. 
Corti’s discovery of the eggs of infusoria, 
560. 
Crystals, combined phenomena of co- 
lours in, 83; dilation of, 33; elastic 
state of, 268 ; life of, 230, 234, 242. 
, twin, phenomena of ccloursin,83. 
_ Curculio frumentarius, description of, 202; 
devastation caused by, 203. 
Currents, electric, chemical effects of, 414. 
Dal Negro, experiments of, 505, 535. 
Davy, experiments of, 470. 
Death, an absolute, asserted by Dr. Carus 
to be inconceivable, 225. 
Delaroche, his method of measuring quan- 
tities of heat, 3. 
Dermestes Pellio, description of, 205. 
Dextrine, conversion of, into sugar, 565. 
Diamonds, vivid light of dust of, 583. 
Diaphanous media, their resistance to the 
___ passage of heat, 21. 
_ Differences between solar and terrestrial 
heat, 69. 
Distribution of heat in a bar, 131; in 
__ spherical bodies, 131. 
Dollond, glass micrometer of, 564. 
Dove's apparatus, description of, 86. 
. experiments on circular polariza- 
___ tion of light, 75. 
Duality of vegetables, 235, 242, 245. 
-Dulong’s law of elastic fluids, 359. 
Dumas, doctrine of organic atoms of, 571. 
. » on the formation of living bodies 
from elementary organic particles, 570. 
_Karth’s centre, accumulation of heat to- 
wards, 54. 
Earth, motion of heat in the interior of, 
___ 184; primitive state of, 135. 
_ Eau de Javelle, nature of, 270. 
_ Eggs, circulation of fluids in, 251. 
, infusorial, the product of a generatio 
primitiva, 566- 
_ Eggs of intestinal worms propelled by the 
circulation of fluids, 558; circulation 
of, in the blood vessels, 558. 
Ehrenberg, experiments on fungi and 
mould; on fossil infusoria, 400, 407; 
; on the generatio equivoca of infusoria, 
i 
559; oa the origin of organic matter, 
555; on organic molecules and atoms, 
555; on the power of vision, 576; on 
the ultimate power of the microscope, 
| 576. 
_ Electric chime, 507. 
Electricity, influence of, 598 ; calorifying 
_ power of, 517;. distinction between 
quantity and intensity, 523; Henry’s 
INDEX. 
633 
experiments on, 534; Van Moll on, 534; 
Ten Eyck on, 534; nature of, 517. 
Electricity, chemical, 517. 
, Statical, Franklin’s hypothe- 
sis, pinus’s, Messotti’s, on, 466. 
Electric currents, chemical effects of, 414. 
Electro-chemical compounds, 419. 
Electro-magnets, lifting power of, 503. 
Electro-magnetism, application of to ma- 
chines, 532; Schulthess on, 534. 
Euglena, red eyes of, 563. 
Entomostrati, curious origination of, 560. 
Entozoa, eggs of, 558; diseases produced 
by, 558; fecundity of, how limited, 559; 
inaccessible station of, 559. 
Epicurus, hooked atoms of, 476. 
Epizoa, vast increase of, 559. 
Equivalents, law of, in galvanic decom- 
positions, 524. 
Eruca of Pliny and the Vulgate, 189. 
Esenbeck, on the germination of the seeds 
of fungi and mould, 556. 
Euler on the equilibrium of fluids, 550. 
Eumolpus vitis, ravages of, 204. 
Exogenous trees, long duration of, 585. 
Eye, human, power of vision of, 555; ir- 
ritability of, 499; myopical and pres- 
byopical, difference between, 577. 
Eyes of infusoria,extreme fineness of, 574. 
Faraday on the nature of electricity, 517. 
, his law of equivalents in galvanic 
decompositions, 524. 
Fechner’s experiments on the galvanic 
chain, 513. 
Fengier’s apparatus for preparing pure 
zinc, 521. 
Fermentation, alcoholic, action of, 604. 
Fermentation, infusorial, 233, 555, 571. ° 
, peculiar process of, 555. 
Ferrault. on organic analysis, 595. 
Ferriferous carbonate of lime, 260; struc- 
ture of, 260; primitive form of, 261. 
Fire, its action on metals, 108. 
Fixed stars of the microscopic world, 583. 
Flame, coloured, 491. 
Flint, formation of, 410. 
Fluids, elastic, Dulong’s law of, 359. 
, incompressible, equilibrium of, 
548. 
Fetus, development of the, 247, 248. 
Fossil infusoria, their occurrence, 400. 
Fourier on the distribution of heat in a 
homogeneous atmosphere, 128. 
Franklin, hypothesis of, 466. 
Frauenhofer, calculations of, 501. 
Fray, delusion of, as to the origin of En- 
tomostrati, 560. 
Fresnel on the diffraction of light, 480. 
Frogs’ blood, globules of, 407. 
Frogs, celebrated Agyptian, 560. 
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