"Grainers" (Open Vats) in which brine (water pumped into bottom of salt wells which is pumped up again mixed with the salt) is evaporated by steam (steam goes thru pipes seen under brine) & the salt floats & is carried on toward further end where rakes and & aprons are. (See #2) Salt Vats Where Water Is Evaporated by Steam, Ithaca, N.Y

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