The 16-foot butt log will be taken from each tree selected and the entire merchantable hole of one average tree for each species.
Field Notes and Shipping Instructions
Field notes as outlined in Form—a Shipment Description, Manual of the Branch of Products, will be fully and carefully made by the collector. The age of each tree selected will be recorded and any other information likely to be of interest or importance will also be made a part of these field notes. Each log will have the bark left on. It will be plainly marked in accordance with directions given under Detailed Instructions. All material will be shipped to the laboratory immediately after being cut. No trees will be cut until the collector is notified that the laboratory is ready to receive the material.
DETAILED INSTRUCTIONS
Part of Tree to be Tested
(a) For determining the value of tree and locality and the influence on the mechanical properties of distance from the pith, a 4-foot bolt will be cut from the top end of each 16-foot butt log.
(b) For investigating the variation of properties with the height of timber in the tree, all the logs from one average tree will be used.
(c) For investigating the effect of drying the wood, the bolt next below that provided for in (a) will be used in the case of one tree from each locality.