XVI LIST OF ILLUSTRATIONS 



FIG. ''*== 



112. Raw material in the form of poplar bolts being placed in vertical excelsior machines 427 



113. Vertical type of excelsior machines in operation at a factory in Union, New Hamp- 



shire 430 



114. A good stand of cork oaks in Andalusia in southern Spain 434 



115. Weighing pieces of cork in the cork oak forests of southern Spain, just after stripping 



and drying 43^ 



116. Character of bark as it is brought to the factory from the forest 438 



1 1 7. A large cork factory in Seville, Spain 439 



118. BaUng cork after boiling, scraping, grading and trimming 44° 



iig. Sorting and trimming sheets of cork 44' 



1 20. Baled cork scraps at a cork factory 442 



