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forfeited its good qualities during storage. This deterioration 

 is in no way revealed by the P 2 5 amount and can just as 

 little be judged by the spirit-proof. 



Of not less importance is the application of the physiolo- 

 gical test in the husking mills themselves, in order to decide 

 to what degree the milling and the polishing of the rice 

 may be continued, so as to please the taste of the consumer, 

 without doing any injury to the required demand, that it 

 still offers sufficient protection against beri-beri. 



X. Conclusions. 

 The results of the investigations above given in full, may 



be summarised as follows: 



1 st . On the ground of taste, no reasonable and still less 

 insurmountable objections can be made to the use of 

 unpolished rice which offers sufficient protection against 

 beri-beri. 



2 nd . Compared with finished rice, unpolished rice becomes 

 easily and speedily unfit for consumption, by decay, by 

 damages done by insects, etc. Although periodical 

 exposure to diffused daylight and regular turning over 

 of the stock have a favourable influence with regard 

 to deterioration during storage, still unpolished rice can 

 scarcely be kept for longer than two months without 

 even quite perceptible alterations. 



3 rd . The necessity of preserving unpolished rice, which must 

 be kept for some time, is best practically met by the 

 use of chloroform or carbon tetrachloride. These are 

 applied in the form of vapour, for which comparatively 

 small quantities are sufficient. They do not modify the 

 hardness, the smell or the taste of the rice, and they 

 exercise a favourable influence on the preservation of 

 the desired activity. 



4 th . The P 2 5 proof with the fixed amount 0,4°/ of this 

 substance is not sufficiently to be relied upon when 

 testing rice as to its value as protective against beri-beri. 



