This link Opens a series of PPT's  collectively known as

Dr.Robertson's series of the 'wind Reader' Lectures given at the Agricultural Colledge of Iceland, and the University Colledge of North Wales.    

i Further Reading:   http://www.windandlandscape.com/documents/waterpowered-sawmills.pdf

                  Ye may always be sticking in a tree, windy or not,

                        it will be growing when you are sleeping