1911] 



Kofoid: Self-dosing Water Bucket. 



351 



The bucket is lowered on the end of the cable to the desired 

 depth with the cylinder and lid in the position shown in figure A. 

 Then the spherical cast-iron weight which parts in two halves is 

 tied about the cable and dropped upon the head of the bucket, 

 releasing the two hooked clutches which suspend the lid, with 

 the attached cylinder, to the head, and dropping them to the 

 position shown in figure B. The lid is locked in place by spring 

 catches in the standards, and twenty liters of water from any 

 desired depth are thus secured. 



Fig. C. Sleeve of headpiece on standard, with steel rollers above and 

 belovr. X 14. 



In practice we found that slight unevenesses on the standards, 

 or slight obliquities in the positions of lid and cylinder, led to 

 one or both failing to close when released, because of this binding 

 of the sleeves upon the standards. In the new model this defect 

 has been obviated entirely by reconstructing the sleeves of the 



