N 



D 



'75 



A B 



E 



[B.] 



Obfei-vations with the Pendulum from the 14th to the i6th of Auguft, 1773, in Latitude 79° 44' N. 



Obfervations 

 retcrreci to 



20 — 



I — 



40- 



41- 



I — 



5- 

 1- 



5- 

 25- 



21- 



6- 

 20- 



6- 

 21- 



6- 



5- 



-21 



- 2 

 -41 

 -42 



- 3 



- 6 



- 4 



- 7 

 -42 



-40 

 -20 

 -40 

 -21 

 -41 

 -40 

 -42 



Duration in 

 Time by 

 the Watcli. 



Seconds 

 giiincd 

 by the 

 Pendu- 

 lum on 

 the 

 Watch. 



59 55 

 30 00 



20 47. 



36 34 

 13 30 



9 22i 



o 9 

 14 59 49 



22 59 22i 



23 01 23 



23 52 17 



24 01 18 

 24 52 12 

 ^5 23 II 



47 53 3S'^ 

 64 00 191 



4 



Mean 

 Height 

 if the 

 rher- 

 iTioine- 



5 

 6i 



I2| 

 26 



29i 



374- 



51 



60 



97^ 

 9(>i 



103 



101; 



108 



109 



204I 



2804. 



Difference of the 

 Thermometer at 

 the Time of 

 adjufiinent in 

 London, and at 

 theTimeofOb- 

 fervalion. 



37 



43J 



40 



40 

 40 1 



^t 



381 



36 

 381 



'I 



38^ 



361 



38 



38 



37i 



23 



i6f 



20 



20 



24 



21J 



24 



211. 



22 



24 



2I| 



23J 

 22 

 22 

 22i 



6 



Contraiflion of 

 rhe pendulum 

 rod by the 

 cold, in parts 

 of an Inch. 



Time gained or 

 the V\'atch b) 

 the contiaiEtior. 

 of the Pmdu- 

 I urn rod. 



,0057 

 ,0042 

 ,0050 

 ,0050 

 ,0049 

 ,0060 

 ,0054 

 ,0060 



»oo54 



,0060 



,0054 

 ,0057 



.0055 

 ,0055 

 ,0056 



0,26 



0,25 



0,54 

 1,25 



1,41 

 2,26 

 2,70 



4.17 

 5.75 

 5,86 

 6,60 

 6,00 



6.75 



6.49 



12,20 



16,67 



rime g lined b-. 

 the tcndulum or 

 the Watch, cor 

 retried for the 

 Thermometer. 



4.74 



6,25 



11,96 



24,75 

 28,09 



35.24 

 48,30 



55.83 



9^^1S 

 90,64 

 96,40 



95.50 

 101,25 

 102,51 

 192,30 

 263,83 



D d 



rime loft by the 

 Watch accord- 

 ing to its Rate 

 of going, as de 

 terniined by the 

 Altitudes of the 

 Sun, 



0,99 



1.47 

 2,31 



5.63 



6,14 



8.04 



10,86 



•4,79 

 22,71 



22,73 



23.55 

 23,72 



24.59 

 24.43 



45>49 

 63,20 



10 



Time gained by 

 the Pendulum on 

 the Mean Time, 

 allowing for the 

 Thermometer 

 and rate of the 

 Watch's lofing. 



3^1^ 



4.78 



9.65 

 19,12 



21,95 



27,20 



37'44 

 41,04 

 69,04 

 67,91 

 72,85 



71,78 



76,66 



78,08 



146,81 



200,63 



1 1 



Ratio of Acce- 

 leiation per 

 Honr. 



3''9 

 4,11 

 3,4' 

 3.52 

 3.34 

 3,41 

 2,73 

 3>oo 



2,9J 



3.05 

 2,99 



3,08 



3,06 



1 2 



Ratio of acceleration of 

 the Pendulum on the 

 McanTimeinTwenty 

 Four Hours. 



72.07 

 70,79 

 73,24 



73,9 

 73,86 



73-57 

 75,23 



Mean 73,06 



Which gives the Accele 

 ration of the Pendulum 

 on true Time from the 

 change of Latitude, 



From 



