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Diffusion in Agar Gels by a Light Absorption Method 2879 and 2.94 g. of absolute ethanol. Ethyl y-(o-methoxyphenyl)-butyrate (14 g., 0.063 mole) was then added dropwise with stirring and the mixture refluxed for twelve hours. The reaction mixture was decomposed with water and extracted with ether. A red viscous oil remained after distillation of ether.5 -M ethoxy-3,4-dihydro-1,2-naphthalic Anhydride (VIII).-The above oxalyl ester was added slowly to 120 cc. of concentrated sulfuric acid, the temperature being kept between 20-25°, and the mixture allowed to stand for two hours at room temperature. The solution was poured onto ice, the yellow solid filtered and recrystallized from benzene-ligroin, yield 5.2 g. (36% based on starting ester VIb), m. p. 169-170°.

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The sugars in a sulfite waste liquor havc been recovered nearly quantitatively and free of ionic impurities by dialysis and ion exchange resin treatments of the liquor. Separation of these recovered sugars and of known sugar mixtures by partition chromatography on starch columns using a 1-butanol-water system has been studied. Behavior of the sugars investigated has been found to be in accord with a theory of chromatographic processes and relative elution rates are satisfactorily correlated with independently determined partition coefficients. The sugars present in a paper pulp sulfite waste liquor derived from 85% Western Hemlock and 15% White Fir are found to be distributed as follows: mannose, 48%; glucose, 15%; xylose, 15%; galactose, 10%; arabinose, 6%; fructose, less than 2%; unaccounted for, 4%.