ANALYTICAL INDEX. 



39 



Conduction of heat, i. 333; ii. 179-184. 



Conducting powers of bodies, ii. 181. 



Conic sections, i. 174. 



Conical valves, ii. 475. 



Connecting rod and crank, ii. 459, 469. 



Constellations, forms of, ii. 332. 



Constellation Cassiopeia, ii. 336. 



Consumption of steam, variation in the, ii. 

 512. 



Contemplation of the firmament, and the 

 reflections thereby produced, i. 51. 



Converging and diverging rays of light, ii. 

 348. 



Convex reflector, i. 263. 



Cooling, process of, by evaporation, ii. 172, 

 174. 



Cornish system of inspecting steum-engine, 

 ii. 522. 



Corpuscular theory of light, i. 224, 231. 



Correspondence betweea the tides and the 

 phases of the moon, i. 211 ; between elec- 

 tric and magnetic variations, ii. 155. 



Coulomb lays the foundation of electro-stat- 

 ics, i. 136. 



Coulomb's researches on artificial magnets, 

 ii. 115. 



Crane the, ii. 255, 261. 



Crowbar and handspike, ii. 247. 



Crown and bevelled wheels, ii. 262. 



Cruikshank's experiments in galvanism, i. 

 37i. 



Cryophoius, Dr. Wollaston's, ii. 174. 



CrvMnllLzHtion of salts, ii. 26. 

 aU, ii. 27. 



Cube, the, ii. 224. 



Cupping, ii. 55. 



Cycles of nineteen years, i. 417; of nine 



years, i. 419. 

 Cylindrical cock, the, ii. 481. 



D. 



Dalton's law of liquids, ii. 166. 



Damper, self-regulating, ii. 513. 



Dampness, dangerous effects of, ii. 173. 



Dancers, position of, ii. 235. 



Danger from lightning during storms, ii. 

 101. 



Davy's researches on the subject of galvan- 

 ism, i. 371 ; his celebrated Bakerian lec- 

 ture; prize awarded him by the French 

 academy, i. 379 ; discovery of the trans- 

 ferring power of the pile in chemical ac- 

 tion, i. 379 ; his electro-chemical theory, 

 i. 379. 



Day and night, inequalities of, i. 485. 



Days and nights of the planets, i. 56. 



Death of Prof. Richmann, i. 120. 



Deceptive oral disk in the horizon, ii. 91. 



Decomposition of water, i. 370; of distilled 

 water, i. 380; of potash and soda, i. 385. 



Deluse, the, was it produced by Whiston's 

 comet, i. 429 ; Mosaic account of the, ii. 

 77. 



Density, ii. 28; of the earth, i. 490. 



Description of auroras seen at Fort Enter- 

 prise during the polar voyage of Captain 

 Franklin, 1/99. 



Dew, ii. 175. 



Diagonal barometer, i. 292. 



Dick's observations on the last appearance 

 of Halley's comet, i. 188. 



Disability, ii. 29. 



Dilatation or expansion, i. 328. 



Dip of the magnetic needle, ii. 113. 



Dipping-needle, invention of, ii. 113. 



Discovery of barium, strontium, calcium, and 

 magnesium, i. 395 ; of induction by Frank- 

 lin, i. 131. 



Disk of the sun concealed by the disk of the 

 moon, i. 83. 



Distribution of the electricity of the air, ii. 

 156. 



Diurnal motion of the earth, i. 485 ; of Ju- 

 piter, i. 238. 



Diurnal rotation, ii. 332 ; of the electricity 

 of the atmosphere, ii. 153. 



Diurnal variation of the magnetic needle, 

 ii. 115. 



Diverging and converging rays of light, ii. 

 348. 



Dog-star, the, or Sirius, ii. 338. 



Double stars,'ii. 351, 362, 373. 



Double-acting engine, ii. 448, 467, 468. 



Double suns, ii. 369. 



Dry Voltaic piles, i. 400 ; dry pile regarded 

 as an extended Voltaic series, i. 401. 



Dufaye's experiments in electricity, i. 107. 



Duty of a steam-boiler, ii. 520. 



Dynamics and statics, ii. 243. 



E. 



Earth, the, i. 55, 477-498; appearance of, 

 as seen from the moon, i. 317; annual 

 motion of, i. 480 ; diurnal motion of, i. 

 485; negative state of the, ii. 156. 



Ebullition, ii. 297-318. 



Echo, the cause of rolling thunder, i. 554. 



Eclipse, solar, how formed, i. 69. 



Eclipses, solar and lunar, i. 7986. 



Eclipses of Jupiter's moons, i. 244. 



Ecli ptic, the, whence it derives its name, i. 85. 



Ecliptic limits, i. 85. 



Effect of light on the retina of the eye, ii. 

 347. 



Effects of lightning, ii. 63-82 ; popular im- 

 pressions of the effects of thunder, ii. 78; 



Effects of steam, ii. 400, 401. 



Elastic force, water raised by, ii. 53. 



Elastic and inelastic fluids, ii. 403. 



Elasticity and compressibility of air, i^ 

 198. 



Elasticity of air, ii. 41-60; of fluids, ii. 32; 

 of steam, ii. 306; of different gases, ii. 

 404. 



Electricity, i. 103-140; resinous and vit- 

 reous, i. 108; distribution of the elec- 

 tricity of the air, ii. 156. 



Electric acid, i. 379. 



Electricity, atmospheric, ii. 149-160. 



