638 
Steam, mechanical force of, 349. 
Steel, violet colour of, its property, 110. 
Steffens, H., on carbon and hydrogen as 
characteristics of the silicecus series, 
and of vegetables ; nitrogen and hydro- 
gen, of the calcareous series, and of 
the animal world, 232. 
Sturgeon’s experiments, 504, 536. 
Streams, their origin from woody moun- 
tains, 241. 
Sugar, conversion of dextrine into, 585; 
curious property of, 592. 
———, starch, 592; cane, 592; carrot, 
605; parsnep, 605; beet-root, 605. 
, grape, 592 ; optical phenomenon 
of, 596. 
, cane, analogy of with starch su- 
gar, 596; physical character of, 597. 
Sulphuric acid, theory on the formation 
of, 476. 
Sulphurets, alkaline, action of the pile on, 
428. 
, metallic, crystallization of, 431. 
Sulphurous acid, volatility of, 444. 
Tannin, action on animal matter, 595. 
Tenia, curious mode of propagation, 564. 
Tabanus bovinus, notes produced by, 378. 
Ten Eyck’s electric experiments, 534. 
Terrestrial atmosphere, altitude of, 394. 
Terrestrial and solar heat, differences be- 
tween, 69. 
Thermoscopes, description of, 8. 
Thermomultiplier, 9; Gourjon’s, 70. 
Thorax of insects, description of, 378. 
Transmission of radiant heat, capacity of 
bodies for, 30. 
Transmission,calorific, modifications of,39. 
Treviranus’s method of forming infusoria, 
232. 
Tripoli, 401 ; infusoria of, 408. 
Tourmaline, optical phenomena of, 59. 
Twilight-Monad, vast increase of, 575. 
Twin crystals, phenomena of colours in, 
83. 
END OF THE FIRST VOLUME. 
ALERE 
PRINTED BY RICHARD AND JOHN E. TAYLOR, RED LION COURT, FLEET STREET. 
INDEX. 
Undulatory theory, objections to, 477. 
Unity, organic, 240, 252; Carus’s notion 
of its division into duality, 242. 
Vapour, violet, produced by iodine and 
indigo, distinction between, 596. 
Vapours, theory of, 370. 
Varying colours, laws of, 102. 
Vegetable kingdom, influence of, upon the 
earth, 241, 
Vegetables, dualism of, terrestrial and 
aérial, 235; cellular formation of, 237; 
metamorphosis of, 238; sensibility of 
240; irritability of, 241, 252, 253. 
Vessels, formed by circulating fluids, 251. 
Vibrations of lamine of glass, &c. 139. 
Vine, insects injurious to, 167, 171. 
Voltaic action, formation of metallic ox- 
ides by, 420, 
pile, chemical effects in, 513. 
apparatus, magnetic power pro- 
duced by, 511. 
Walckenaer on insects of the vine, 167. 
Watkins’s experiments on electricity, 536. 
Watt, discovery of, 506. 
Water-drop, formation of, 229. 
Wheel-animalcules, intestinal canal of, 
561; red-coloured eyes of, 561. 
Wheels, hydraulic, construction of, 506. 
Wiesenerz, formation of, 402. 
Wires, conducting power of, 311. 
Wood, analysis of, 143. 
World, infusorial, Milky Way of, 566. _ 
, microscopic, fixed stars of, 583. ” 
Worms, intestinal, Ehrenberg on, 557; 
generatio primitiva of, 557; structure 
of, 557; cyclical development of, 558; 
occurrence of, 558; fecundity of, 558. 
Wrede on the absorption of light, 477. 
Zamboni’s electrical clock, 533. 
Zinc, apparatus for preparing it pure, 521 ; 
crystals of the oxide of, 425. 
Zoophytes, generatio equivoca of, 572. 
Zymom, origination of the lowest forms 
from, 570; formed by silica, 571. 
Volo T~ VT. 
GD teloue the 
Marck (Eo 
FLAM MAM 
Sioa! 
