[Avodah] electricity on Shabbat

[Micha Berger]

On Wed, Jan 06, 2010 at 06:54:37PM -0500, david guttmann wrote:
: What is the issur of a spark? Even hot metal, putting it out is only
: Derabanan. A spark in itself is not fire without something to attach itself
: to. A spark in the air I have difficulty seeing the issur. 

It's not fire? Metal is disappearing off the contact, there is glowing
air... It's a momentary flame, really.

BTW, that din is given in Beitza 4:7, explained on 33b, and is called
molid. Not an issue of havarah or bishul, nor is it called derabbanan.
Molid is an approach we didn't mention yet. The Teshuvos Beis Yitzchaq,
at the end of 2:41 holds that "molid zerem" is inlucded in the problem of
"molid reicha", discussed in Beitza 23a, creating a perfume for one's
clothes. RSZA questions the analogy.

Tir'u baTov!
-Micha

-- 
Micha Berger             It is our choices...that show what we truly are,
micha at aishdas.org        far more than our abilities.
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