50 
A MANUAL FOR NORTHERN WOODSMEN 
TABLE GIVING SECULAR CHANGE OF THE MAGNETIC DECLINA 
TION IN THE UNITED STATES 
Year 
(Jan.1) 
Colorado 
East 
(Pueblo) 
Colorado 
West (Glen- 
wood 
Springs) 
New Mexico 
"3t 
(Sant.-. Rosa) 
New Mexico 
West 
(Laguna) 
Arizona 
East 
(Holbrook) 
Arizona 
West 
(Prescott) 
1750 
1760 
1770 
1780 
1790 
1800 
1810 
1820 
1830 
1840 
O / 
O / 
O ! 
O / 
O / 
O f 
1850 
13 47E 
16 07E 
12 43E 
13 26E 
13 33E 
13 23E 
1860 
13 50 
16 15 
12 47 
13 33 
13 44 
13 37 
1870 
13 46 
16 16 
12 43 
13 34 
13 47 
13 44 
1880 
13 31 
16 04 
12 25 
13 22 
13 40 
13 44 
1890 
13 00 
15 40 
12 00 
13 02 
13 25 
13 36 
1900 
12 53 
15 39 
11 57 
13 02 
13 29 
13 43 
1910 
13 19 
16 10 
12 28 
13 36 
14 05 
14 25 
1920 
13 29E 
16 22E 
12 47E 
13 56E 
14 25E 
14 46E 
