HOD: YESHIVAT HAVERIM יְשִׁיבָה חברים – BABYLONIAN TALMUD p73

“But it is permitted,” etc. The rabbis taught: One may pour hot water upon cold, but not cold
upon hot water, so is the decree of Beth Shamai; Beth Hillel, however, allows both ways,
provided a cup is used; but in a bathing-tub hot water upon cold is permitted, but cold water
upon warm is not. But R. Simeon b. Menassiah forbids it. And Na’hman said that so the Halakha
prevails. R. Joseph was about to say that a bucket is under the same ruling as a bathing-tub. Said
Abayi to him: “So taught R. Hyya, that a bucket is not in this category.”
Said R. Huna b. R. Joshua: “I observed that Rabha was not scrupulous with regard to the use of
vessels, because R. Hyya taught, one may put a pitcher of water into a bucket of water; it makes
no difference whether it be hot water into cold o r vice versa.” Said R. Huna to R. Ashi:
“Perhaps this was a different case altogether, it being that there was a vessel within a vessel!”
But the latter retorted: “It says: ‘To empty’; as it was taught: It is permitted to empty out a pitcher
of water into a bucket of water, be it either warm water into cold or vice versa.”
MISHNA VI.: In a saucepan or a pot that was removed from the fire, no spices shall be put after
dusk (on Friday); but spices may be put into a plate or a bowl. R. Jehudah is of the opinion that
spices may be put in all vessels or cooking utensils except in such as contain vinegar or fish
brine.
GEMARA: The schoolmen propounded the following question: Does R. Jehudah refer to the
first part of the Mishna, which is lenient, or does he refer to the latter part, which is rigorous?
Come and hear. We have learned in a Boraitha that R. Jehudah says: “One may put (spices) into
all saucepans and cooking-pots, except such as contain vinegar and fish brine.”
R. Joseph was about to say that salt comes under the same ruling as spices, because in his
opinion salt becomes cooked in a first vessel (i.e., the vessel used for cooking), but not in a second vessel. Said Abayi to him: R. Hyya distinctly taught that salt does not come under the ruling applicable to spices, because it does not become cooked, even in a first vessel. This is corroborated by R. Na’hman, who said:
There is a saying that the dissolving of salt requires thorough boiling, the same as beef.