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P 2 5 content, were shown more and more clearly. Only a 

 few ciphers are sufficient to demonstrate these varieties. 

 While 0,192% P 2 5 was found in the kernel of Idjoean rice, 

 crop 1913, and in that of 1914 almost the same amount 

 namely 0,2%, the quantity of P 2 5 in the kernel of Boeloe 

 rice, crop 1912, was not less than 0,3%. 



As to the physiological effect of various kinds of rice 

 which had undergone different degrees of milling, even 

 superficial observation showed tolerably great differences, 

 and the impression was thereby received, that, within certain 

 limits, all manner of varieties are possible and that the 

 effect is not always parallel with the P 2 5 amount. Even 

 the kernels — that is the grains of the one sort from which 

 the silver-skin had been entirely removed — gave much 

 less the impression of insufficient activity than did those of 

 the other kind. This last fact can at any rate in some 

 measure, give the explanation as to how one completely 

 polished kind of rice may give so much less cause for the 

 breaking out of beri-beri than does another kind. No doubt 

 this made it formerly very difficult to obtain correct views 

 as to the etiology of this disease (compare with Appendix). 



In any case it is not to be denied that although there is 

 a certain connection between the P 2 5 amount, as well as 

 of that of other substances contained in rice on the one 

 hand, and the physiological working on the other hand, still, 

 the above shown facts have definitely proved that it is not 

 always possible to judge of the effective working of rice 

 on the ground of its P 2 5 amount. The value cipher (0.4%) 

 to be given as criterion presents an insufficiently absolute 

 standard therefor. The necessity of another test for rice is 

 hereby at the same time demonstrated. 



VIII. The Spirit-proof. 



Even during the first investigations as to the degree of 

 milling of some kinds of rice, in which the P 2 5 amount 

 was taken as standard — long before the inefficiency of that 



