185 



and white rice on the other side would be clearly brought 

 to light. This conclusion was accidently confirmed during 

 the first series of estimations, both of the Po0 5 amount and 

 of the dry-residue made from the Idjoean and Boeloe kinds 

 of rice collected in June 1913 at Lema-abang. The results 

 of these estimations are given below in 



TABLE VIII. 







P 2 5 content of: 



o/ S P iritdry- 





undried 

 material. 



dried 

 material. 



residue : 



Idjoean unpolished rice, crop 1913. . 



Idem. white rice (sosoh). . . . 



Idem. quite polished rice (sikat). 

 Boeloe unpolished rice, crop 1912 . . 





0,52 o/o 

 0,26 „ 



0,63 „ 

 0,37 „ 

 0,3 „ 



0,3 „ 

 0,224 „ 

 0,73 „ 

 0,427 „ 

 0,345 „ 



0,644. 

 0,277. 

 0,152. 

 0,66. 



Idem. quite polished rice (sikat). 



0,182. 



In consequence of later investigations, where more allowance 

 could be made for the gradually discovered influence exerted 

 on the dry-residue cipher by the duration of storage, this 

 supposed advantage could not be maintained. Their results, 

 a review of which is given below in table IX, can nevertheless 

 give an impression of the value of the spirit-proof in general. 

 In connection herewith the observation deserves attention, 

 that during these successive processes which the rice under- 

 goes, the dry-residue cipher shows, as a rule a much greater 

 decline than the P 2 5 amount, as soon as the limit is 

 reached between rice still retaining some of the silver- 

 skin and rice from which this has been completely 

 removed. 



