54 



a half months that stored at 75 had undergone slightly greater 

 deterioration than had the standard sample in a year. The other 

 pocket, stored at 65 and examined at the same time, showed a 

 deterioration about midway between the standard and that kept at 

 75- 



The following table* gives figures showing the influence of 

 temperature on the amount of soft resin present : 



RESINS EXPRESSED ON DRY HOPS. 



Date of Analyses. Soft. Hard. Total. 



Hops as put in bottle .. .. Jan. 22, 1895 .. 11-75 .. 3-16 .. 14-91 



A. Hops stored seven months at 



72-75 F Aug. 19, 1895 . . 8-82 . . 5-94 . . 14-76 



B. Hops stored seven months at 



55-65 F Aug. 21, 1895 .. 9-21 .. 5-15 .. 14-36 



C. Hops stored seven months at 



35-40 F Sept. 5, 1895 10-67 4' 20 14*87 



D. Hops stored seven months at 



below 32 F. .. .. Aug. 26, 1895 .. irio .. 3-57 .. 14-67 



These figures demonstrate at once the injurious influence of 

 high and the beneficial effect of low temperatures. For practical 

 purposes storage at any temperature below 40 is effective, but in 

 actual working it is found more convenient to reduce the tempera- 

 ture to below the freezing point of water, thereby insuring the 

 contact of hops with moisture-free air. If the hops are stored at 

 40, some steps have to be taken to withdraw the moisture from the 

 air, though if this is done there should of course be an economy by 

 the reduced cooling power required. In the early days of hop 

 storage the writer, in conjunction with Mr. MEACHAM, proposed the 

 adoption of a system based on these lines ; but it is only proper to 

 say that the experience of some four or five years has modified these 

 views, and though hops can be, and still are, very satisfactorily 

 stored on such a system, the economy which was anticipated has not 

 been realised in actual practice. The system, therefore, of storage 

 at temperatures below 32 may be fairly stated to hold the field as 

 that best adopted for the preservation of hops. 



Two systems of cold storage have been used : One in which the 

 brine pipes are placed in the cold storage chamber and act upon 



* " Hops," Briant & Meacham : Journal of the Federated Institutes of Brewing. 

 Vol. XI., No. 6, p. 414. 



