Frigorifick

[W]hen vve have, as vve very frequently have, put mixtures of ſnovv and ſalt into vials, and left them in the open Air, vve generally obſerv'd, that the outſide of the Glaſs vvas cas'd vvith ice, or covered vvith hoar froſt, directly over againſt that part of the inſide of the Glaſs, vvherein the frigorifick mixture vvas.