70 HAAN. 



to April 30, 1902, the patients from twelve pavilions of the asylum 

 received the following in addition to the ordinary diet : 



In 3 pavilions, 150 grams of katjang idjo; in 3 pavilions, 300 grams of fresii 

 greens; and in 6 pavilions, ordinary diet. The pavilions were disinfected once a 

 week with carbolic soap, 3 per cent, in order to kill any insects which might be 

 of importance in the dissemination of beriberi. 



The following were the results : Seventy lunatics who ate katjang idjo 

 did not develop any cases of beriberi. The 86 who were given fresh 

 greens gave 16 cases, and 33 of the 78 who lived in the disinfected 

 pavilions contracted the disease. There were 58 control patients, of 

 whom 19 contracted beriberi. 



The curative power of katjang idjo was proved by the following : 



Out of 64 patients suffering from beriberi, 44 were treated witli 

 katjang idjo, and these recovered; 20 were left without these beans, 

 and of these 7 died, 6 recovered or improved, and 7 became worse; but 

 after the use of katjang idjo the latter also became well. 



Doctor Hulshoff-Pol proved that a decoction of katjang idjo has the 

 same curative and preventive power as the beans themselves, not only 

 when given to patients suffering from beriberi, but also to fowls with 

 polyneuritis. He prepared the decoction by boiling 1,000 grams of kat- 

 jang idjo with 2.5 liters of water during one and one-half hours, until 

 only 1 liter remained. 



In 1908 Dr. Kiewiet de Jonge, in our laboratory, repeated Doctor 

 Hulshoff-Pol's experiments on 384 patients in the lunatic asylum at 

 Buitenzorg. Katjang idjo was given to 182 of these, but not to the 

 remaining 202. The result was as follows: 



(A) As to the curative action of katjang idjo: 



With Without 



... . katjang idjo, katjang idjo, 



Suftered from beriberi and — per cent. per cent. 



remained unchanged 15.0 23.4 



improved 75.0 13.3 



became worse 10.0 63.3 



died 2.5 30.0 



(B) As to the proplxylactic action of katjang idjo. 



With Without 



katjang idjo, katjang idjo. 

 Had no beriberi and — per cent. per cent. 



did not contract the disease 97.2 76.2 



contracted it 2.8 23.8 



contracted it and died 9.3 



Thirty-six patients were treated with a decoction of katjang idjo. The 

 symptoms of the disease either were greatly ameliorated, or totally dis- 

 appeared among all of them. 



In the year 1909, together with Doctor Grijns, I published a series 

 of experiments describing our attempts to prove the presence of anti- 

 bodies in the blood serum of beriberi patients, or of fowls suffering from 



