Sources
http://www.professorbeaker.com/lever_fact.html
http://historiccamdencounty.com/ccnews69.shtml
http://www.christian-action-eng.org/in-china/
http://bible.cc/jeremiah/52-18.htm
http://www.deere.com/en_US/ag/index.html
http://en.wikipedia.org/wiki/Foundation_(engineering)
http://www.youtube.com/watch?v=sxdYqSRmmMs&feature=player_embedded#at=20
http://www.mine-engineer.com/mining/mine2.htm
wordnetweb.princeton.edu/perl/webwn
http://books.google.com/books?
id=iSd8hm5kImwC&pg=PA304&lpg=PA304&dq=cow+scapula+shovel&source=bl&ots=cYm0kVT0I_&sig=x9VFlkdzJ62OqGg8BaHiJT7NBA8&hl=en&ei=wvlWTdS6LYH3gAe3oKXmDA&sa=X&oi=book_result&ct=result&resnum=6&ved=0CDMQ6AEwBQ#v=onepage&q=cow%20scapula%20shovel&f=false