Originally Posted by
David
Its tow horses. In the "old days", horses were used to tow the barges along the canals
But I thought that was along the Volga River in Russia. In vector calculus we used to do line integrals to compute the total amount of work done by the horses. No wonder I flunked history! 
(ie just horsing around you might say - curse of the Kelpies.)
When I first saw the title of this thread, I got all excited because I thought it was going to be about fish that live around seaweed.
I changed my signature. The old one was too ridiculous.
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