Xviii LIST OF ILLUSTRATIONS 



FIG. PAGE 



121. A cypress raft in a Louisiana bayou. The floating vegetation on the 



extreme right is the water hyacinth 387 



122. A raft bundle at the mill pond. North Carolina 388 



123. General structural features of flume and sluice boxes 397 



124. A V-flume for transporting mining stulls. Montana 399 



125. Details of a trestle bent for a lumber flume; also the method of cross- 



bracing the bents 402 



126. A five-leg flume trestle for heights greater than 75 feet 403 



127. The terminal of a log flume, near the Deerlodge National Forest, Mon- 



tana. This type is known as an "elephant " 404 



128. Two types of flume terminals 406 



129. A turpentine box for the collection of crude turpentine 445 



130. A workman cutting incisions on the face of the tree, into which gutters 



are to be inserted. Herty system 450 



131. A tree equipped with a Herty cup and gutters. The first streaks will 



be cut at the upper edge of each face 451 



132. A Herty cup on a "yearling" crop. The cup was raised at the begin- 



ning of the second season 45 2 



133. The McKoy cup used for the collection of crude turpentine 453 



