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A BLOCK OF ICE WITH THE SIZE O' : <br />10' x 3' x 20' lung will cequire S r.iillion BTU to melt. <br />70 GPM water at 3E• F. has 20,000 BTU/HR. <br />If ict block is exposed to cold weather, it will never melt, <br />because of water discharge into the lagoon or lake. <br />W^T R R <br />,&.-r ; $a F ' <br />