1878.] Magnetic Declination at Prague. 391 



ranges has already been made in previous communications (Proc. Roy. 

 Soc, March 22, 1877, and Feb. 7, 1878). 



Table III. Prague Declination-Range. — Nine-Monthly Values.* 





1839. 



lo41. 



t O AO 



- 



184o. 



1847. 



i o 4 n 

 lolW. 



1 OKI 



lOOd. 



Jan. (0) .... 





110/ 



/ /O 





OO.I 



izyy 



1 AQft 

 lUOD 



v /4 



Feb. (0) .... 





1155 



779 



844 



932 



1286 



1028 



953 



Mar. (0) .... 





1126 



782 



847 



940 



1280 



1019 



936 



April (0) . . . . 





1092 



780 



846 



957 



1277 



1003 



911 



May (0) .... 





1040 



793 



855 



994 



1257 



995 



882 



June (0) .... 





990 



812 



861 



1040 



1220 



989 



866 



July (0) .... 





965 



802 



863 



1096 



1192 



985 



870 



Aug. (0) .... 





954 



791 



869 



1155 



1167 



1013 



879 



Sept. (0) .... 





950 



783 



864 



1203 



1153 



1052 



884 



Oct. (0) .... 





937 



753 



839 



1230 



1146 



1093 



917 



Nov. (0) .... 





920 



734 



821 



1250 



1135 



1124 



947 



Dec. (0) . . . . 



1278 



911 



727 



824 



1266 



1128 



1128 



951 



Jan. (0) . . 



Feb. (0) . . 



Mar. (0) .. 



April (0) . . 



May (0) .. 



June (0) .. 



July (0) .. 



Aug. (0) .. 



Sept. (0) .. 



Oct. 

 Nov. 



(0) 

 (0) 



Dec. (0) .. 



1840. 



1842. 



1844. 



1846. 



1848. 



1850. 



1852. 



1854. 



1262 



914 



719 



835 



1269 



1134 



1131 



962 



1237 



909 



710 



850 



1271 



1156 



1136 



973 



1213 



889 



703 



877 



1283 



1173 



1130 



980 



1175 



869 



718 



912 



1292 



1175 



1122 



984 



1161 



843 



729 



926 



1279 



1180 



1107 



968 



1163 



826 



750 



938 



1259 



1178 



1088 



949 



1141 



826 



795 



969 



1245 



1168 



1063 



912 



1151 



817 



813 



978 



1250 



1159 



1039 



875 



1175 



801 



810 



961 



1281 



1154 



1027 



868 



1178 



789 



808 



938 



1310 



1139 



1009 



862 



1185 



779 



810 



927 



1315 



1094 



995 



862 



1178 



776 



814 



924 



1311 



1055 



989 



861 



Table IV. Spotted Solar Areas. — Nine-Monthly Values.* 





1839. 



1841. 



1843. 



1845. 



1847. 



1849. 



1851. 





730 



456 



181 



384 



722 



1113 



675 



Feb. (2) 



731 



436 



171 



398 



705 



1073 



668 



Mar. (2) 



745 



400 



144 



407 



728 



1008 



663 



April (2) 



795 



362 



115 



419 



805 



964 



677 



Mav (2) 



866 



358 



101 



413 



946 



890 



695 



June (2) 



853 



363 



95 



403 



1068 



797 



678 



July (2) 



792 



369 



102 



382 



1103 



751 



632 



Aug. (2) 



772 



365 



114 



353 



1148 



726 



618 



Sept. (2) 



787 



335 



111 



348 



1231 



694 



615 



Oct. (2) 



795 



293 



102 



383 



1288 



678 



613 



Nov. (2) 



786 



264 



103 



444 



1305 



661 



638 



Dec. (2) 



775 



255 



117 



506 



1309 



632 



656 



* Tbe numbers in Table III correspond to the beginning of each month, while 

 those in Table IY correspond to the middle of each month. 



