Because of the chemical composition and physical properties of agricultural residues, they may find a unique place in the field of industrial saccharification. A continuous process for the saccharification of agricultural residues which makes use of these properties has been developed through a largescale laboratory stage. This process is a two-stage operation in which the pentosans are first hydrolyzed by dilute acid. The cellulose is then saccharified by a new concentrated acid method which uses less than one fourth the amount of acid required by other known concentrated acid processes.

is believed that the data are consistent and that the moderate scattering of the points in Figures 2 and 3 is not unreasonable. Figure 3 can be used to obtain1 equi-T~~, . , Weight % in:-Pressure

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