Vol. XIII. No. 2 THE HORIZONTAL COMPONENT OF MAGNETIC INTENSITY AT OSLO OBSERVATORY 1843-1930 9 O'Clock H = 15000+ 14 O'Clock H = 15000+ (9999 = No data) 1931 Jan. Feb. Marz Apr. May June July Aug. Sep. Oct. Nov. Dec. Jan. Feb. Marz Apr. May June July Aug. Sep. Oct. Nov. Dec. 1 951 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 944 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 2 926 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 941 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 3 939 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 957 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 4 970 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 966 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 5 925 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 961 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 6 944 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 964 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 7 951 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 961 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 8 931 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 967 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9 941 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 961 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 10 918 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 939 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 11 924 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 961 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 12 895 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 914 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 13 908 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 944 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 14 934 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 944 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 15 923 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 946 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 16 916 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 873 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 17 879 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 867 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 18 891 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 931 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 19 901 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 907 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 20 917 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 900 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 21 921 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 910 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 22 914 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 932 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 23 931 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 936 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 24 932 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 920 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 25 961 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 947 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 26 910 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 925 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 27 897 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 910 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 28 910 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 886 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 29 938 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 895 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 30 927 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 913 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 31 928 9999 9999 9999 9999 9999 9999 924 9999 9999 9999 9999 9999 9999 Mean 924 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 935 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999 9999