I think that the following sentence has Jachin and Boaz reversed:
The Senior Warden's column is called Jachin and signifies "Strength", whereas the Junior Warden`s column is called Boaz and signifies "To establish in the Lord".
It is the last sentence in paragraph 6 of the following page: http://www.freemasons-freemasonry.com/larsonwilliam.html
In our teachings, Boaz means "In Strength" and Jachin "God Will Establish".
Please correct me if I am wrong.
Brotherly Yours,
Pierre