19 
No. 8.] PENDULUM OBSERVATIONS. 
Le ee See le ee ee eee es ak 
‘=I a a bserved D : 
BS eeil aims of Cosas | 2 metab Gomese oe 
Balu o i a Oo F tion of Calculation of Period 
g| os cidence os cidence ec 
Saleaae Guo Coincidences 
Zz Zz al 
33 | Bar, | 763°55 18°.7 Bar. = 7612 
t | 1361 13°65 t = 1363 = 18°.95 
a 49 — 50 37—39 a=41 
hm s hm s m §s 
= 798.1709 
1| 948457 | a1 | 1098192 |30c—39335 Ape ee 
p) 50 43 | 32 29 38-2 33:9 
3 51 931 | 33 30 57:8 347 log ¢ = 1:8985656 
4 52449 | 34 32 165 346 | log (2c—1) = 21968444 
5 oD O1 30 33 35° 304 9°7017215 
6 55 198 | 36 34 53:8 340 |log1SHaw.= 94717 
7 56 385 | 37 36 147 362 
1 = 9 2 
8 57 575 | 38 37 33:3 358 OB) Serr 
y 59 167 | 39 38 528 361 
¥ = 05060498 
10 0358 | 40 4 115 35:7 : pa Fe 
it 1547 | 44 44 312 36°5 LOR e Near 
= 39 35°12 : 
a ee aces 30 ¢ = 39 35°127 as 
# | 1365 13°59 Sgg = 0°5059138 
Bar. 7635 17°.8 
Christiania. The Pendulum-house (in the garden of the Observatory). 
Distance 7 = 1930 mm., thermometer 20, barometer, an aneroid, Cary 623, of which 
the correction was daily determined by the aid of a hypsometer, Tonnelot 11364, with 
divisions of fiftieths of a degree. 
May 30th, 1897. 
Comparison of Clocks. 
Pendulum Michelet Pendulum Michelet 
hm s hm s hm s hm s Error of Pendulum x, 
92 99 AS 6 11 985 3 47 52 11 35 3895 May 30, Midnight — 44°75 
25 50 14 30 50 57 38 44 » 31, —— — 44°78 
22 9A 19 6 12 59:25 3499-5 11 37 11°75 
log 18 Michelet = —56.10—7 
Hawelk Michelet Hawelk Michelet Hawelk Michelet 
hm s hm s hm s hm s hm s hm s 
4 18 515 6 45 255 5 30 55 7:57 495 628585 856 95 
20 34 47 85 32 40 59 35 30 40°5 57 52 
4194275 6 4617 5 31 475 758 49°95 6 29 495 857 O75 
log 18 Hawelk = 0:0020482 
log 18 Hawelk — 00020478 
