'D A, LU S M R ND (..rne-, FloridIa State CItambn T of Commerce UMBER manufacturing is a major industry in Florida.-and here vast pine. cypress and hardwood forests supply the world with much of its most useful building material.-lumber. To cut the timber and transport the logs to the mill necessitates the building of temporary roads, rail- roads and spur tracks:-and what an interesting sight these networks present from the air as they run for miles through thi.k forests, branching out into all directions and ending abruptlv at a hundred dif- ferent points.