i 



INDEX. 



633 



Commutator, construction of, 504. 



Convolvulus of Cato and Pliny, 187. 



Copper, crystals of the protoxide of, 42 1 ; 

 subnitrate of, 423. 



Corti's discovery of the eggs of infusoria, 

 560. 



Crystals, combined phaenomena of co- 

 lours in, 83; dilation of, 33; elastic 

 state of, 268 ; life of, 230, 234, 242. 



. , twin,phaEnomenaofco!oursin,83. 



CurcuUofrumentariii.s, 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. 



Earth's centre, accumulation of heat to- 

 wards, 54. 



Earth, motion of heat in the interior of, 

 134; primitive state of, 135. 



Eau de Javelle, nature of, 270. 



Eggs, circulation of fluids in, 251. 



, infusorial, the product of a generatio 



primitira, £66- 

 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 cequivoca of infusoria, 

 559 ; ofi 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 iiittnsity, 523 ; Henry's 



experiments on, 534; Van Moll on, 534; 

 Ten Eyck on, 534 ; nature of, 517. 



Electricity, chemical, 517. 



, statical, Franklin's hypothe- 

 sis, ^Epinus's, Mossotti'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. 



Eumoljius 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. 



Eyesof infusoria,extreme fineness oi, 574. 



Faraday on the nature of electricity, ill. 



, 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, 583i 



Flame, coloured, 491. 



Flint, formation of, 410. 



Fluids, elastic, Dulong's law of, 359. 



, incompressible, equilibrium of, 



548. 



Foetus, development of the, 247, 248. 



Fossil infusoria, their occurrence, 400. 



Fourier on the distribution of heat in a 

 homogeneous atmosphere, 128. 



Franklin, hypothesis of, 4(S6. 

 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 .(Egvptian, 560. 



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