. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 8 BULLETIN 282, IT. S. DEPARTMENT OF AGRICULTURE. tended to reach a state of equilibrium irrespective of the treatment of the sample. Figure 2 gives a graphic representation of the increase in the hard- resin content of sulphured and unsulphured hops in cold and in open storage. During the first year the increase in the hard-resin content in the sulphured hops was greater in open storage than in cold storage. At the end of the second year the sulphured hops hi both cold and open storage con- tained about the same perce
. Bulletin of the Department of Agriculture. Agriculture; Agriculture. 8 BULLETIN 282, IT. S. DEPARTMENT OF AGRICULTURE. tended to reach a state of equilibrium irrespective of the treatment of the sample. Figure 2 gives a graphic representation of the increase in the hard- resin content of sulphured and unsulphured hops in cold and in open storage. During the first year the increase in the hard-resin content in the sulphured hops was greater in open storage than in cold storage. At the end of the second year the sulphured hops hi both cold and open storage con- tained about the same percentage of hard resins. The unsulphured hops followed the same lines, but did not present quite so marked a difference during the first year of storage. At the end of the third year the hard-resin content in all the samples had become uniform and a state was reached where the increase, if any, was very slow. Table V gives the percentage of increase in the hard-resin content of the various samples as compared with the original, the hard-resin content of the latter being considered as 100 per cent. Table V.—Increase in the hard resins of sulphured and unsulphured hops in cold and in open storage, compared with the hard-resin content of the original VSAAS //V STOPAGE Fig. 2.—Curves of the percentage of hard resins in sulphured and un- sulphured hops in cold and in open storage. Treatment at the kiln. Original sample, 1911. Cold storage. Open storage. 1913 Sulphured Unsulphured. Per cent. 100 100 Per cent. Per cent. /'(r i'i Hi. Per cent. IS. 21 Per cent. 72. SI Per cent. The sulphured hops appeared to react less readily to changes that bring about an increase in. the hard resins. From this it is inferred that sulphuring is a factor that retards the changing of soft resins to hard resins. This is shown most emphatically in Table V by the fact that the percentage of increase hi the unsulphured hops was much less
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