Lunar Theory (Cambridge 1896), or the work of Watson or of Bauschinger on Theoretical Astronomy.
Wohler, repeated by Johann Bauschinger, Sir B.
As in the tests made by Bauschinger, the percentage of moisture contained in the wood was very carefully observed, and it was found that this amount of moisture has a very great influence upon the resisting power of the wood, the strength increasing with the dryness of the material up to 3 or 4% of moisture, at which point the greatest strength of the wood is reached.
One general conclusion arrived at both by Bauschinger and Johnson was that the strength is much affected by the specific gravity of the timber.
Bauschinger, "Report of Tests made upon Timber at Munich," Mittheilungen aus dem Mechanisch-Technischen Laboratorium der K.