Reference for Shabbat 30:9
אלא מעתה
sand, the Rabbis declared it the same as earthenware.<span class="x" onmousemove="('comment',' Other edd. omit 'R. Johanan said in the name of', reading simply Resh Lakish. It is certainly unlikely that R. Johanan, who, as head of the Academy at Tiberias enjoyed a superiority over Resh Lakish, his contemporary, would report his statement. ');"><sup>16</sup></span> If so, let them be incapable of purification in a mikweh?<span class="x" onmousemove="('comment',' Just as earthenware. ');"><sup>17</sup></span> Why then did we learn, And the following interpose in utensils: pitch and myrrh gum in the case of glass vessels?<span class="x" onmousemove="('comment',' Mik. IX, 5. When a utensil is purified in a mikweh, nothing must interpose between it and the water; if it does, the immersion is ineffective: pitch and gum on the side of a glass vessel constitute an interposition. ');"><sup>18</sup></span> — The circumstances here<span class="x" onmousemove="('comment',' In Mik. IX, 5. ');"><sup>19</sup></span> are e.g., they were perforated, and molten lead was poured into them, this agreeing with R. Meir, who maintained, Everything depends on the support.<span class="x" onmousemove="('comment',' The perforated glass vessel is supported by the lead, i.e., it can be used only through the lead. Hence, according to R. Meir, it is a metal, not a glass vessel. ');"><sup>20</sup></span> For it was taught: If glass vessels are perforated and [molten] lead is poured into them, — said R. Simeon b. Gamaliel: R. Meir declares them unclean, while the Sages declare them clean.<span class="x" onmousemove="('comment',' Rashi in R.H. 19a offers two explanations: (i) When an unclean vessel is perforated, it becomes clean, since it can no longer be used as a vessel. Now, if a metal utensil is thus broken and then repaired, it reverts to its former state, but not so a glass vessel (infra 16a). R. Meir maintains that a glass vessel supported by metal is treated as metal; while the Rabbis hold that it is still regarded as a glass vessel. (ii) A clean glass vessel supported by metal becomes Biblically unclean, according to R. Meir, as a metal utensil, while the Rabbis hold that it is Biblically clean, as a glass vessel, and is subject to defilement only on account of the Rabbinical enactment; the reasoning being the same as before. Tosaf. a.l. s.v. [H] is inclined to agree with the second interpretation. ');"><sup>21</sup></span> If so,<span class="x" onmousemove="('comment',' Since they are treated as earthenware vessels. ');"><sup>22</sup></span>