CONTENTS 



231. Standard scale 



232. Color scheme . . 



233. Formation and vegetation maps 



234. Continental maps 

 Photography 



235 



The camera and its accessories 



The choice of a camera 

 The use of the camera 

 The sequence of details 



240. The time of exposure . 



241. Developing .... 



242. Finishing 

 Formation and Succession Herbaria 



243. Concept and purpose . 



244. Details of collecting 



245. Arrangement 



246. Succession herbaria . 



236. 



237- 

 238. 



239- 



DEVELOPMENT AND STRUCTURE 



247. Vegetation an organism 



24S. Vegetation essentially dynamic 



249. Functions and structures . 

 Association 



250. Concept .... 



251. Causes .... 



252. Aggregation 

 Kinds of Association 



253. Categories .... 



254. Stratum association 



255. Ground association 



256. Species guild association 



257. Light association 



25S. Water-content association . 



THE DEVELOPMENT OF THE FORMATION 



_ 259. . 



Invasion 



260. 

 Migration 

 261. . 



210 

 210 

 210 



