xviii LIST OF ILLUSTRATIONS 
FIGURE 
282. Common Field Daisy ..... 
PAGE 
. 301 
283. 
Pleurococcus .... 
. 304 
284. 
Spirogyra. 
. 306 
285. 
Spirogyra Conjugating 
. 306 
286. 
Bacteria. 
. 309 
287. 
Beef Jelly. 
. 314 
288. 
Beef Jelly. 
. 314 
289. 
Correct Stoppers for Milk Bottles 
. 315 
290. 
Yeast Plants .... 
. 320 
291. 
Fermentation Tubes . 
. 321 
292. 
Bread Mold .... 
. 322 
293. 
Shaggy-mane Mushroom . 
. 323 
294. 
Oyster Mushroom 
. 324 
295. 
Common Field Puffball 
. 325 
296. 
Bit of Lichen .... 
. 325 
297. 
Lichens. . 
. 326 
298. 
Types of Moss .... 
. 328 
299. 
Diagram of Life History of Moss 
. 329 
300. 
Marchantia with Archegonia 
. 330 
301. 
Marchantia with Antheridia 
. 331 
302. 
A Common Liverwort 
. 331 
303. 
Forked Veins of Fern Leaf 
. 333 
304. 
Cross Section of Stem of Pteris . 
. 334 
305. 
Pteris, a Common Fern 
. 334 
306. 
Diagram of Life History of Fern 
. 335 
307. 
Sporangia of Fern 
. 335 
308. 
Equisetum .... 
. 336 
309. 
Sporophyll of Equisetum . 
. 337 
310. 
Equisetum ..... 
. 337 
311. 
Club Moss. 
. 338 
312. 
Equisetum, Sterile Stalk 
. 338 
313. 
Sporophyll of Club Moss . 
. 339 
314. 
Equisetum Spore 
. 339 
315. 
Cross Section Stem of Equisetum 
. 340 
316. 
Conifers ..... 
. 342 
317. 
Young Female Strobilus 
. 343 
318. 
Male Strobili .... 
. 343 
319. 
Mature Female Strobilus or Cone 
. 344 
320. 
Pollen Grain of Pine . 
. 344 
321. 
Other Cones .... 
. 345 
322. 
Virgin Forest of Mixed Hard Woods and Conifers 
. 347 
