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deteriorated. As soon as the husk is removed, however, the 

 retaining of its effect is considerably less assured. Unpolished 

 rice which had been stored for 5 months in the hospital 

 appeared to have lost little of its effective working, while 

 there was distinct diminution when this storage had been 

 continued for one month longer. In the case of unpolished 

 rice, which had been kept for 6 months in a stoppered bottle, 

 there was however very little of this diminution to be noticed. 



Generally speaking — taking into consideration the supposed 

 facility with which the active properties of the silver-skin 

 can be destroyed — the deterioration was much less than 

 might have been expected. 



Unpolished rice which had been kept in paper for more 

 than 6 months, in which time the grains had been com- 

 pletely hollowed out by insects, appeared also to be still 

 very effective, which was to be attributed to the special 

 circumstance that owing to this hollowing out of the grains, 

 the percentage of silver-skin had considerably risen. It was 

 most astonishing, that 2'/ 2 gram of this much damaged rice, 

 even after it had been exposed for 30 hours to a temperature 

 of 105°C, completely cured a diseased bird in one day's 

 time. The instability of the effective substances, at any 

 rate under ordinary circumstances and under the influence 

 of dry heat, was thus shown to be much less than is 

 generally supposed. 



The washing out of the rice has a less favourable 

 influence than its storage, so that this manupulation which 

 is absolutely necessary for preparing the rice for consumption, 

 is not to be carried further than is indispensable for this 

 purpose. Unpolished rice which had been kept for 4 months, 

 and then washed, — in accordance with the regulation, until 

 the water which ran off was not too milky — and afterwards 

 dried, had become ineffective. 



The first of the diseased birds used for these experiments 

 gave an important indication as to the manner in which an 

 eventual physiological test ought to be taken, for these 



