Look what I found an old Practical guide to pumping concrete. Cool.
Todd 12-12-2009
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http://books.google.com/books?id=Sw28HgydeD8C&pg=PA251&lpg=PA251&dq=pumping+concrete+with+granulated+blast+furnace+slag&source=bl&ots=mZK4LtmPBJ&sig=W7ysm8JzQydaJAMBQGsm3HxgQyE&hl=en&ei=8xYkS5T3BoPWtgOatrjgDg&sa=X&oi=book_result&ct=result&resnum=10&ved=0CDkQ6AEwCQ#v=onepage&q=pumping%20concrete%20with%20granulated%20blast%20furnace%20slag&f=false
AK1 12-13-2009
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now that is cool really cool because as you look through it it has several manufactured machines in it several type valves although i didn't see any old thompsons thanks Todd good find