xvi LIST OF ILLUSTRATIONS 



FIG. PAGE 



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 43 



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 436 



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 



1 1 8. Baling cork after boiling, scraping, grading and trimming 440 



i IQ. Sorting and trimming sheets of cork 441 



1 20. Baled cork scraps at a cork factory 442 



