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0 C.-A thermo-junction was placed in 0.5 cc. of a^olution of known concentration and galvanometer readings were taken every 10 seconds during the cooling. At about -35 0 a rapid evolution of heat took place accompanied by expansion sufficient to break the glass tube if the solution filled more than the rounded bottom. On heating the solution a corresponding absorption of heat was observed at -20 0 . From the observed temperature changes and the specific heat the amount of heat evolved ordoi:10.1103/physrev.19.623 fatcat:3hh77uj3ljc4titm3z5yf3rmjy