"Nicky" > wrote in message
...
> On Tue, 14 Sep 2010 12:57:41 -0700, "Ellen K."
> > wrote:
>
>>The only restrictions
>>are that the milk is not allowed to become hotter than 113 F
>
> Why that precise figure, Ellen, do you know?
>
> Nicky (intrigued...)

I'm not sure exactly about the temperature of the liquid itself, however it
might be related to the more general rule that in order to put a cooked
solid food on a hot surface in order to warm (but not further cook) it on
the sabbath, the hot surface has to be a temperature where a normal person
can comfortably rest their hand. So I would guess maybe it has been
determined that somewhere around 45 C is the highest temperature where a
normal person can comfortably rest their hand.