280 QUESTIONS. 



CHAPTER VIII. 239. How large are the particles of tho elements 

 of plants ? Organic compounds ? 240. What is meant by organized ? 

 241. The most important organic compounds ? 242. Cellulose? Why 

 is it called woody fibre ? 243. Vegetable Jelly ? 244. Starch ? Where 

 is it found ? How important is it as an article of food ? Whence is it 

 obtained for use in the arts ? What use is made of it? 245. Gum? 

 Dextrine ? 246. Sugar ? Sugar candy ? Muscovado sugar ? What 

 plants yield it most abundantly ? 247. Vegetable oil ? From what is 

 it extracted ? Linseed oil ? Colza ? 248. Wax ? Beeswax ? 249. 

 What relation exists between these compounds ? Effect in the animal 

 system ? 250. Nitrogenous Compounds ? Why so called ? What are 

 they in their simplest form ? Why called protein ? 251. Protein form ? 

 Effect in the bodies of animals ? 252. Casein ? 253. Albumen ? 254. 

 Gluten ? What plants contain it abundantly ? 255. Importance of 

 this fact ? 256. Whence must every thing in the body of an animal 

 have come ? Whence, previously ? 257. Chlorophyl ? 258. Whence 

 the yellow colors ? The rich autumnal colors ? 259. Whence coloring 

 substances ? 260. Tannin ? Properties ? 261. What powers seem to 

 be acting in plants ? How ? 



CHAPTER IX. 262. What is known of the interior of the earth? 

 The crust ? An element ? How many have been found ? 263. How 

 many of them are metals ? Some of the more common metals ? 

 Describe such as you know. In what state are most of the metals 

 found ? Ores ? 264. Found pure ? Aerolites ? 265. Geology ? A 

 geologist ? Chemistry ? A chemist ? Chemical analysis ? 266. The 

 soil ? The three most important earths ? 267. From what has the 

 soil been formed ? The principal rocks ? 268. Granite ? Sienite ? 

 Greenstone ? Trap-rock ? Gneiss ? (pronounced nice.} Mica Slate ? 

 Porphyry? The Granitic rocks ? 269. Their qualities? Composed 

 of? 270. Silex or Silica ? Why is it called silicic acid? When pure, 

 called ? How abundant is it ? Beautiful stones are silica ? How, in 

 the processes of nature, is it dissolved? 271. Its usual form? 272. 

 Silicious Rocks ? Soil is formed of these two kinds of sand ? 273. 

 Slaty or Argillaceous Rocks ? Clay ? What kind of earth does it 

 form? Colors? Properties? 274. Kinds of clay? Made of clay? 

 Plastic arts? Kaolin? Petuntze ? Uses? 275. Aluminum? Alu 

 mina? The Sttpphire and the ruby? The topaz? The diamond? 



276. Calcareous Rocks ? Chalk? Sort of soil is a calcareous soil ? 



277. Pudding-stone Hocks? What holds tin. 1 materials together: Soil 

 is formed of them? 278. What has happened to all these rocks? 

 What six substances does the sand formed from granitic rocks contain ? 



