ILLUSTRATIOXS 



PAGE 



Utilization — The Field of the Forest Products Laboratory 



Begins Here ....... Frontispiece 



Three Foresters. United States Forest Service .... 3 



The Yard to AVliicli Come T^ogs from Many Climes and Coun- 

 tries ........... 8 



Organization Cliart, Forest Products Laboratory . . .14 



Erection of the Million Pound Timber Testing jNIachine (1920) . 17 



Three Directors, Forest Products Laboratory . . . .20 



The Timber Mechanics Laboratory . . . . . .24 



Box Testing in tlie Big Tumbling Drum . . . . .27 



A Charge of Ties Entering the Preservation Cylinder at the Lai)- 



oratory .......... 30 



War Work — An Airplane AVing Rib Being Placed in a Testing 



Machine 36 



Personnel Development Chart— July, 1917 to July, 1920 . . 39 



Laminated Construction as Applied to AVooden Articles of Com- 

 merce ........... 44 



Glue Spreading ^Machine ........ 46 



Some AA'^ar Time Installations of Types of Dry Kilns Developed 



at the Lal)oratory ........ .50 



Wood Distillation Retort 56 



Studying the Many Factors Entering int« the ^lanufacture and 



Storage of Airplane Propellers . . . . . .62 



Forest Service Improvements in Turpentining . . . .68 



Wood Technology — The Microscope is Useful in Identification . 72 



