238 



How many seconds are nccessary to form a dröp? 

 After how many seconds has it attained a length of 

 3 mm? 



The following series are given as examples: 



The last experiments, beginning from distance 15,9 cm, 

 were made with a new tube of 25,5 cm in lenglh and 0,45 

 mm in diam. 



