Mesorat%20hashas for Chullin 49:13

והני תוכו הא דרשינהו

and again another for [the rule that] the air-space of this [vessel can suffer uncleanness], and not the air-spa of any other [vessel]; and again another for [the rule that] the air-space of this [vessel can suffer uncleannes and not the air-space [of another vessel] which is within the air-space [of this vessel];<span class="x" onmousemove="('comment',' I.e., if a vessel containing foodstuffs or liquids is suspended in the airspace of an earthenware vessel in such a way that the rim of the inner vessel is above the rim of the outer vessel, and a reptile is suspended in the airspace between the two vessels, then the contents of the inner vessel are not unclean, for they are not regarded as being within the air-space of the earthenware vessel, but only within the air-space of a vessel which is itself within the air-space of the earthenware vessel. The inner vessel, in other words, is a protection against the uncleanness reaching its contents, and for this reason, viz., since a vessel-even one which can be rendered unclean by contact from the outside - cannot be rendered unclean if it comes within the air-space of an unclean earthenware vessel (v. Pes. 20a) , its contents will be protected from uncleanness.');">¹¹</span>

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