Reference for Chullin 249:3

<big><strong>גמ׳</strong></big> נוגע אין אבל מאהיל לא

WITH REGARD TO A THIGHBONE OF A CARCASS OR OF A [DEAD] REPTILE, IF IT WAS STOPPED UP HE WHO TOUCHES IT REMAINS CLEAN,<span class="x" onmousemove="('comment',' The bone of a carcass or of a reptile is in itself not unclean (v. supra 77b) ; it is, however, unclean because it serves as a 'protection' to the marrow that is within it. And this is so only if the marrow within was accessible, i.e., the bone must be pierced so as to allow a hair at least to reach the marrow.');">²</span>

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow

Jastrow