Specific gravities?

[Shawn W Miller]

Can someone with a good reference work help me out?

What are the specific gravities (air dry) of the following timbers?
	Any mass/volume measure will suffice.

White Oak; Quercus alba L.


White Pine; Pinus strobus L.


Sitka Spruce; Picea sitchensis (Bong.) Carr.


Douglas Fir; Pseudotsuga menziesii


Western Red Cedar; Thuja plicata D. Don

	Thanks a great deal,   Shawn Miller