RESULTS OF METEOROLOGICAL OBSERVATIONS. 



231 



VI. TABLE OF THE VARIATION OF THE NEEDLE^ 



For Ufe in the Landoffice at Pierrepont Manor in JefFerfon County, Newv-York, 

 in Lat. 43° 43' 45" N. and Lon. 75° 56' 57" W. ; and to apply to Great 

 Tradls N° 4, 5 & 6, Macomb's Purchafe, which were furveyed and allotted 

 from 1795 to 1803. 



Made 1823 September 18, and 1856 November 25 : 



BY WILLIAM C. PIERREPONT. 



Variation : Yearly, 5' 14". 4367; Daily, 0"'. 86107. 



1797 October 



1, no variation. 



1840 Nov. 25, 



var.w. 3°46'09".10 



1797 Nov. 25, 



var.w. 0°00'48/'24 



1841 



3 51 23.54 



1801 



21 45.99 



2 



3 56 37.98 



1802 



27 00.43 



3 



4 01 52.42 



1803 



32 14.87 



4 



4 07 06.86 



1804 



37 29.30 



1845 



4 12 21.30 



1805 



42 43.76 



6 



4 17 35.74 



1806 



47 58.17 



7 



4 22 50.18 



1811 



1 14 10.35 



8 



4 28 04.62 



1816 



1 40 22.54 



9 



4 33 19.06 



1820 



2 01 20.30 



1850 



4 38 33.50 



1 



2 06 34.74 



1 



4 43 47.94 



2 



2 11 49.19 



2 



4 49 02.38 



3 



2 17 03.62 



3 



4 54 16.82 



4 



2 22 18.06 



4 



4 59 31.26 



1825 



2 27 32.05 



1855 



5 04 45.70 



6 



2 32 46.94 



6 



5 10 00. U 



7 



2 28 01.38 



7 



5 15 14.58 



8 



2 43 15.82 



8 



5 20 29.02 



9 



2 48 30.26 



9 



5 25 43.46 



1830 



2 53 44.70 



1860 



5 30 57.90 



1 



2 58 59.14 



1 



5 36 12.34 



2 



3 04 13.58 



2 



5 41 26.78 



3 



3 09 28.02 



3 



5 47 41.22 



4 



3 14 42.46 



4 



5 52 55.65 



1835 



3 19 56.90 



1865 



5 58 10.10 



6 



3 25 11.34 



6 



6 03 24.54 



7 



3 30 25.78 







8 



3 35 40.22 







9 



3 40 54.66 







Note. The only actual observations preserved are, 1823 September 18 : 2^16' 05" 



1847, 4 23 



1856 November 25, 5 10 



1860 July 15, 5 36 



1863, 5 44 



1864 April 12, 5 50 



1865 May 4, 6 00 

 Theodolite records only to minutes. 



* Received too late for reference in the Contents. 



