for retaining the curative as well as the prophylactic properties. 

 As to the preserving quality, these substances differed from 

 each other little or not at all. After having been kept in 

 them during 7—8 months, there was still no diminution in 

 the working to be remarked. This was however somewhat 

 noticeable after 10 months, and after a year it was distinctly 

 evident. In the last case, there was soon some improvement, 

 but complete recovery generally only took place after 4 or 5 

 days, and in a single case it appeared after about 10 days. 



That the preservation of the desired effect is not perfectly 

 absolute, can not in the least be considered as an objection 

 to the use of chloroform and CC1 4 ,— not to speak of alcohol, 

 which for some other reasons must be declared as unfit for 

 use as preservative. For in connection with the time of 

 harvest, etc, the rice will certainly never need to be stored 

 for longer than 9 — 10 months. 



With a view to the preservation of the prophylactic 

 properties, the objections to the use of calcium oxide are 

 not nearly so important as are other disadvantages connected 

 with its use and which have been above described. Under 

 its influence the effective working diminishes very gradually 

 but still in such a measure that storage with this substance 

 is less desirable than ordinary storage without preservative. 

 Unpolished Idjoean rice which had been kept for 5 months 

 with CaO showed although only in a slight degree inferiority, 

 when compared with a sample of the same kind of rice, 

 which had been stored for the same length of time, under 

 ordinary conditions, in the hospital. In this respect also, 

 CaO can therefore make no claim to the title of preservative. 



On account of its influence on smell and taste, as well 

 because of its unfavourable effect on the effective elements 

 contained in the silver-skin, the use of sulphurous acid is 

 to be considered as hasardous. After having been kept for 

 4 months with S0 2 , unpolished rice produced no improvement 

 and still less recovery. When exposed for a shorter time 

 to the influence of S0 2 , the diseased condition remained 



