the velosity of sound, made in Holland . 
433 
y. Angles measured at Utrecht between Amersfoort and the 
Pyramid of the Camp of Zeist. 
Date. 
No. 
Multiple 
Angles. 
Repeated 
Angles. 
Single 
Angles. 
J Mean angle 
( 21° 38' 39"; 
reduced to centre of sta- 
^ tion 21" 38' o'',5. 
1823. s 
1st. Aug./ 
3 h P. M. ^ 
1. 
2. 
3- 
4- 
5- 
Double 
Quadruple 
Sextuple 
Octuple 
Decuple 
O / // 
43 17 3° 
86 35 
1 29 5 1 
1 73 8 
216 27 30 
0 / // 
21 38 45 
21 38 45 
21 38 30 
21 ?8 30 
21 38 45 
6. Angles taken on tte pyramid of the Camp of Zeist between 
Utrecht and Amersfoort. 
Date. 
No. 
Multiples. 
Repeated 
Angles. 
Single 
Angles. 
i Mean angle 
f 112 0 40' 20", 1 ; 
C angle taken from centre 
\ of station. 
1823. \ 
7th Aug. < 
8 b A. M. J 
1. 
2. 
8. 
4- 
5- 
Double 
Quadruple 
Sextuple 
Octuple 
Decuple 
0 / n 
225 50 
450 41 30 
676 1 30 
901 21 30 
1126 45 30 
0 < h 
I 12 40 
I I 2 40 22,5 
I 1 2 40 22,5 
1X2 40 22,5 
112 40 33 
i Q. Between Utrecht and Zevenboompjes. 
Date. 
No. 
Multiples. 
Repeated 
Angles. 
Single 
Angles. 
1823. \ 
7th Aug. < 
8 h A. M. i 
1. 
2. 
3 - 
4 - 
5 - 
Double 
Quadruple 
Sextuple 
Octuple 
Decuple 
0 / 1 / 
209 35 
419 9 30 
628 45 
838 18 
i °47 53 
0 , ,/ 
104 47 30 
104 47 22,5 
104 47 30 
104 47 15 
104 47 18 
Mean angle 
1 04° 47' 23" ; 
angle taken from cen~ 
tre of station. 
c. Angles taken on the Station of Zevenboompjes. 
a. Between Utrecht and Kooltjesberg. 
1 Mean angle 
f 76° 46' 3 3". 3; 
f angle taken from centre 
\ of station. 
Date. 
No. 
Multiples. 
Repeated 
| Angles. 
Single 
Angles. 
I. 
Double 
O / // 
M 3 33 3 ° 
0 / // 
76 46 45 
I 823. \ 
2. 
Quadruple 
307 6 30 
76 4 6 37,5 
7th Aug,< 
3 - 
Sextuple 
460 39 
76 46 30 
3 h P. M- / 
4 - 
Octuple 
614 12 
76 46 30 
1 
5 - 
Decuple 
767 44 
76 46 24 
3 K 
MDCCCXXIV. 
