4 CONTENTS. 



Technical procedure Continued. Page. 



Technical investigations ^ 23 



Fundamental principles 23 



Projects 23 



Incorporation in annual investigative program (Forest Service 



Order No. 41) 24 



Preliminary investigations 24 



Working plans 25 



Description of material 26 



Progress reports 27 



Inspection reports on durability tests 27 



Project reports 27 



General inspections 28 



By members of Forest Products Laboratory 28 



By members of Office of Industrial Investigations 28 



By members of district offices 28 



Publications 29 



Appendix 30 



Preliminary reports 30 



Working plans 32 



Shipment descriptions 33 



Description of samples 35 



Form of cooperative agreement 36 



Station reports 39 



