Subject: Can heat flow better downwards than upwards in a solid?

See http://ww4.choice.net/~pbfred/Horizontalsphere.htm where I 
run a test which to me indicates that heat can flow easier 
downwards than upwards.  Refridgerators are build on the 
principle that coldness can flow better downward than upward. To 
me this is another indication that in a solid heat can flow 
better downwards than upwards.  Also it is written on cold pack 
to put them on top of the food for coldness flows better 
downward than upwards.

Re: Can heat flow better downwards than upwards in a solid?