0,63% during the first treatment by machinery. The propor- 

 tion found in Idjoean rice, reaped in 1914 and husked at 

 Lema-abang last July, was on the contrary quite different. 

 As gaba it was found to contain 0,62% P 2 5 , just as that 

 reaped in 1913, while the unpolished rice which was produced 

 from this gaba, and which was evidently somewhat less 

 polished had a higher P 2 5 content, namely 0,67%. 



Some years ago, in connection with the osteomalacy 

 question, 12 samples of gaba which came from different 

 garrisons in Java were examined, also as to their P 2 5 

 content. In one of these samples, procured in Soerabaja. 

 as well as in one which came from Malang, the P 2 5 amount 

 was found to be 0,42%, while one sample which was sent 

 from Djokjakarta, contained only 0,38%. This experience 

 led to a systematic search for the unpolished rice in question. 

 For it was obvious that one or more of the just named 

 kinds of gaba, with a small P 2 5 content, might undergo a 

 diminution herein during its preparation to unpolished rice, 

 in the same way as the above mentioned kinds of gaba, 

 and that thereby in like manner an active unpolished rice 

 would be produced with a P 2 5 content far below the 

 standard limit of 0,4%. 



From each of the named garrisons two kinds of gaba 

 were again ordered and the amount of P 2 5 determined. The 

 results of these estimations were successively found to be 

 0,6 and 0,63; 0,62 and 0,73 and 0,56 and 0.7%, but the 

 expectation was not fulfilled of finding amongst them a kind 

 of rice the P 2 5 amount of which was the same as that 

 of the previously examined rice. Had this been the case, 

 it was almost certain that there-with the desired proof would 

 have been provided. 



The possibility was thus converted into probability that 

 there really was a kind of unpolished rice, which, with a 

 much smaller P 2 5 amount than 0,4%, still possessed sufficient 

 activity and this received still more confirmation when the 

 great differences amongst the rice-kernels, also as to their 



