minations will be made on all specimens tested
except those to be photographed or kept for exhibit. A 1-inch
disk will be cut from near the point of failure of bending and
compression parallel specimens, from the portion under the plate
in the case of the compression perpendicular specimens, and from
the centre of the hardness test specimens. The beads from the
shear specimens will be used as moisture disks. In the case of
the cleavage specimens a piece 1/2 inch thick will be split off
parallel to the failure and used as a moisture disk.

RECORDS

All records will be standard.

PHOTOGRAPHS

_Cross Sections_

Just before cutting into sticks, the freshly cut end of at least
one bolt from each tree will be photographed. A scale of inches
will be shown in this photograph.

_Specimens_

Three photographs will be made of a group consisting of four 2"
X 2" X 30" specimens chosen from the material from each
locality. Two of these specimens will be representative of
average growth, one of fast and one of slow growth. These
photographs will show radial, tangential, and end surfaces for
each specimen.

_Failures_

Typical and abnormal failures of material from each site will be
photographed.

_Disposition of Material_

The specimens photographed to show typical and abnormal failures
will be saved for purposes of exhibit until deemed by the person
in charge of the laboratory to be of no further value.

SHRINKAGE AND SPECIFIC GRAVITY

Appendix to Working Plan 124

PURPOSE OF WORK

It is the purpose of this work to secure data on the shrinkage
and specific gravity of woods tested under Project 124. The
figures to be obtained are for use as average working values
rather than as the basis for a detailed study of the principles
involved.

MATERIAL

The material will be taken from that provided for mechanical
tests.

RADIAL AND TANGENTIAL SHRINKAGE

_Specimens_

_Preparation_: Two specimens 1 inch thick, 4 inches wide, and 1
inch long will be obtained from near the periphery of each "_d_"
bolt. These will be cut from the sector-shaped sections left
after securing the material for the mechanical tests or from
disks cut from near the end of the bolt. They will be taken from
adjoining pieces chosen so that the results will be comparable
for use in determining radial and tangential shrinkage. (When a
disk is used, care must be taken that it is green and has not
been affected by