780Ci9101: Evaporation tanks and auxiliary equipment for testing the effect of sodium chloride on evaporation from water at CSU Hydraulic Laboratory
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Wired lightbulb lying on ground. Title information from "Evaporation from Salt Solutions and from Oil-Covered Water Surfaces" by Carl Rohwer in the Journal of Agricultural Research, 1933. Note on envelope reads, "Multigraph; evaporation."