444 Dr. Moll’s account of the experiments on 
Thus, in 21 sexagesimal minutes the index of the centri- 
fugal pendulum at Kooltjesberg made 1458,' ho beats. 
Thus, one sexagesimal minute on the chronometer of 
Kooltjesberg, equal to 69 ,"43 3 turns of the index of the 
centrifugal clock of the same station. 
SECTION VI. 
Experiments on the velocity of sound on the 2,7th June, 1823, 
compared with theory. 
Having thus far stated the means by which the distance 
between the stations of Kooltjesberg and Zevenboompjes was 
ascertained, and the rate determined of the clocks by which 
the velocity of sound was measured, I will now proceed to 
give the experiments which were made on the 27th of 
June, and compare the result with theory. The following 
table contains the time which sound employed to travel 
over the basis on the 27th of June, when 22 shots were 
simultaneously fired, and equally seen and heard on both 
stations. The first column of this table shows the number 
of the shot, the second the time which sound employed to 
travel from Kooltjesberg to Zevenboompjes, as observed on 
the latter station, and the third column the time which 
sound employed to come from Zevenboompjes to Koolt- 
jesberg, also observed on the latter place. 
