INDEX. 



681 



Tables of Experiments, 511, 512. — Composition of 

 Carburated Hydrogen Gas, 513. — Of the Gas called 

 defiant by the associated Dutch Chemists, 514. — 

 Its Analysis, 515. —Properties of the supposed Oil 

 formed by its mixture with Oxymuriatic Acid Gas, 

 51 6. — This Liquid not referable to the Class of Oils, 

 518. — Tables of E?iperiments, 518, 519- — Compo- 

 sition of Olefiant Gas, 520. — ^Oxycarburated Hy- 

 drogen Gas, 523, — Its Composition, 524, 



I 



Ice, Greenland or Polar, Captain Scoresby on the ii- 26l. 

 — Various kinds of Ice described, 264„ — Sea- Water 



Ice, 267 Fresh-Water Ice, 269. — Formation of 



8ea-Ice, 271- — ^In a rough sea, 272. — In sheltered 

 situations, 273.— Generation of Fields, 274. — Their 

 tendency to drift to the south-westward, 277. — Tre- 

 mendous concussions of Fields, 278. — Icebergs, 282, 

 — Magnitude of Icebergs, 284. — Their origin in 

 Bays, 285. — At a distance from Land, 2S6. — Growth 

 of Icebergs formed on the Sea, 288. — Numerous 

 within the Antarctic Zone, and useful to Whale- 

 Fishers, 289 Fragility of Icebergs, 29O. — Ab- 

 stract of remarks on Formation of Polar Ice, 293. 

 — Situation of Polar Ice, and the effects of change 

 of season, 295. — On the Properties, Movements, 

 and Drifting of Ice, 3 06. —Destruction of Dutch 

 Greenland Ships, 310. — Besetment of the ship Esk, 

 312. — Effects of the Ice on the Sea and Atmosphere, 

 318. — Ice-Blink, 321. — On the approximations to the 

 Poles, and the possibility of reaching the North 

 Pole, 325. 



XX 3 



