Refrigerated transportation has been in use since the 1870s when Chicago's stockyards began shipping meat to the East Coast by dripping ice through the roof of railway cars — with frequent stops to replenish the ice.
<script type="text/javascript">adsonar_placementId=1280605;adsonar_pid=42753;adsonar_ps=-1;adsonar_zw=165;adsonar_zh=220;adsonar_jv='ads.adsonar.com';</script><script src="http://js.adsonar.com/js/adsonar.js" language="JavaScript" style="display: none;"></script>
Would you like to comment?
Join Diigo for a free account, or sign in if you are already a member.