Chapter XXXIII: Sewing Machines 186

234. Different types of sewing machines. 235. Lock-stitch sewing
machine. 236. Feed plate. 237. Bobbins. 238. Shuttle bobbins.
239. Chain-stitch machine. 240. Cautions for all machines.
241. General instructions.

CHAPTER XXXIV. AUTOMOBILES 192

242. Starting the motor. 243. Driving the automobile. 244.
Care of car.

CHAPTER XXXV. LAWN MOWERS; INCUBATORS 195

245. Operation and care of lawn mowers. 246. Storing mowers.
247. Scissors and shears. 248. Principles upon which incubator
works. 249. The body of the incubator. 250. Incubators heated
by a lamp. 251. The wick. 252. Thermostat. 253. The thermometer.
254. Operation of incubator. 255. Egg tester.

CHAPTER XXXVI. TYPEWRITERS 202

256. Construction of typewriter. 257. Special features of
typewriter. 258. Interchangeable-type typewriters. 259. Care
of typewriters. 260. The hectograph. 261. Mimeograph and
multigraph.

PART X. MOTORS, FUELS AND GAS PLANTS

CHAPTER XXXVII. TREADLES AND WATER MOTORS 209

262. Definition of motor. 263. The treadle. 264. Water motors.
265. Selecting a water motor. 266. Two types of water
motors.

CHAPTER XXXVIII. ENGINES; MOTORS AND BATTERIES; FUELS 212

267. Gasoline engines. 268. Figuring speed of pulleys. 269.
Operating the engine. 270. Points in caring for engine. 271.
Generating electricity for homes. 272. Batteries. 273. Liquid
batteries. 274. A dry-cell battery. 275. Storage batteries. 276.
Some uses for electric motors. 277. Definition tables.

CHAPTER XXXIX. GAS PLANTS 220

278. Gasoline gas plants. 279. Acetylene-gas plant. 280.
Directions for operating acetylene plant. 281. Cautions to be
observed in using acetylene gas. 282. Compressed gases and oils.

PART XI. MEASURING DEVICES

CHAPTER XL. SCALES FOR WEIGHING 225

283. Equal-arm balances. 284. Unequal-arm balances. 285. Spring
scales.

CHAPTER XLI. DEVICES FOR MEASURING VOLUME 227

286. Graduate and measuring cup. 287. Tablespoons. 288. Teaspoons.
289. Standard measuring spoons. 290. Liquid and cooking
measures. 291. Dry measures. 292. Cubic, square and linear
measures.

CHAPTER XLII. GAS, WATER AND ELECTRIC METERS 230

293. Different kinds of meters. 294. Construction of a gas meter.
295. Reading the gas meter. 296. Water meters. 297. Prepayment
meters. 298. The electric meter.

CHAPTER XLIII. THERMOMETERS AND THERMOSTATS 233

299. Mercury thermometers. 300. Oven thermometer. 301. Maximum
thermometers. 302. Thermostats.

CHAPTER XLIV. HYDROMETERS AND BAROMETERS 237

303. Hydrometer. 304. Hygroscopes. 305. Barometers.