248 



See Table of Obs. Series XIV. 



1°. The tube L^, 0,3 5 mm in diam. 30,8 cm in length 

 withoat lacing in ^). 



2°. The tube L^ 0,45 mm in diam. 29,8 cm in length 

 with lacing in about 11 cm from the lower end. 



3°. The tube Lq (shortened) in diam. 0,6 2 mm in length 

 30,6 cm. Some experiments with the tube L^ (diam. 2,3 5 mm 

 and length 30,8 cm) gave, this time, verv uncertain results. 



The experiments under 3° show that the tube L^ had 

 been altered in the way, which was said above, because 

 the drawn quantities of water are continnally decreasing 

 and the experiments serve only to show how disadvanta- 

 geous such. an alteration can be to the results. In the 

 experiments under 1° and 2° the results, except the first 

 in each series are, tolerably constant. The average of the 

 remaining obs'^^ in each series are 



Sparks mg dist. from Sparks min. 



min. water meniscus diam. wtliout tube. 



for Lg 56,5 2,33 30,2o 0,3 5 55 

 for L^ 56,0 4,2 4 3i,62 0,4 5 53. 

 If the water- quantity in the latter series is reduced to 

 what it w^ould have been, if the distance from the point 

 to the meniscus had been the same supposing that they 

 are inverse proportional to the square of the distances, we 

 shall receive 



mg diam. \ 



^8 2,33 0,35 J, at the average intensity 56,3. 



L^ 4,08 0,45 I 



The ratio of the water quantities is = 2,0 9 4 

 „ „ of the cubes of the diameter = 2,i2 4 

 hence nearly the same. 



As series XIII produced above had been made with 

 tubes, which have been in use for a long time, the results 

 can not be thrustworthy enough to be used as quantitative 

 measurements. 



*) The lacing in proved to be disadvantageoiis in this tube and 

 wa3 omitted. 



