The dependence of the transmi ttancy of a commer cial su gar liquor on the concentration of total solids does not in gf'neral foll ow Beer's law. This behavior is attributed to t he presence of apprecia ble light-scattering m aterial in t he solution. A linear dependence has been found to relate the concentration with the reciprocal of a:, the latter being; ucfincd as equal to ( -log T .) /bc, where T . is the transm ittancy, b t he cell length, and c the concentrat ion of total solids. The intercept at c= O in a plot of l /a; versus c is equal i n magn itude t.o t he limiting slope of the Beer's law plot.
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