Bigelow — Meteorological Elements of the United States. 417 



Table II. — Monthly and Annual Frequency numbers of the Solar Prominences. 



Year 



Jan. 



Feb. 



Men. 



Apr. 



May 



J une 



J uly 



Aug. 



Sept. 



Oct. 



Nov. 



Dec. 



( P / 



M 



P-M 



1872 



220 



230 



227 



187 



254 



274 



335 



330 



193 



146 



140 



109 



2645 1800 



+ 845 



1873 



183 



190 



161 



201 



180 



193 



250 



154 



191 



112 



98 



140 20531700 +353 



1874 



132 



138 



136 



102 



115 



107 



115 



123 



171 



90 



107 



79 



14151569 



-154 



1875 



67 



68 



64 



66 



57 



52 



128 



132 



65 



71 



55 



31 



8561188 



-332 



1876 



32 



51 



38 



49 



47 



51 



107 



136 



111 



94 



80 



80 



876 865 



+ 11 



1877 



40 



75 



59 



37 



55 



95 



54 



115 



82 



42 



31 



57 



7421 695 



+ 47 



1878 



19 



57 



32 



49 



21 



29 



69 



71 



50 



30 



1 



10 



438 1 791 



-353 



1879 



17 



6 



23 



13 



37 



64 



57 



66 



80 



100 



58 



40! 5611015 -454 



1880 



13 



71 



145 



54 



81 



146 



260 



137 



137 



120 



77 



97|1338 , 1332!+ 6 



1881 



45 



80 



88 



109 



210 



177 



299 



284 



187 



121 



258 



1401998! 1604| + 394 



1882 



229 



242 



184 



146 



183 



269 



288 



249 



169 



137 



139 



92i2327|2063l+264 



1883 



95 



137 



97 



133 



183 



122 



219 



167 



133 



233 



135 



142;i796i2252j-456 



1884 



139 



186 



317 



212 



237 



237 



364 



399 



233 



269 



152 



llli2856 2170; + 686 



1885 



104 



197 



146 



111 



226 



351 



328 



221 



177 



104 



126 



19312284 2280+204 



1886 



116 



98 



126 



82 



162 



174 



233 



162 



149 



68 



138 



771585120981-513 



1887 



115 



134 



137 



129 



127 



257 



268 



231 



161 



69 



141 



108(1877 



1671+206 



1888 



198 



107 



197 



266 



181 



117 



.154 



222 



144 



158 



73 



70J1887 



1352+535 



1889 



76 



84 



140 



49 



19 



20 



62 



99 



75 



29 



47 



24 724 



14021-678 



1890 



25 



27 



29 



38 



31 



63 



60 



82 



68 



175 



36 



51 685 



1521-836 



1891 



60 



170 



110 



138 



98 



108 



256 



210 



220 



217 



98 



151 1836 



1592+244 



1892 



83 



95 



122 



158 



207 



330 



323 



298 



305 



186 



216 



1512472 



1740 + 732 



1893 



145 



214 



272 



324 



143 



161 



167 



267 



185 



138 



70 



155'224ll93ll+310 



1894 



87 



141 



159 



104 



114 



178 



157 



167 



116 



78 



104 



621467:18061-339 



1895 



28 



69 



127 



131 



141 



181 



257 



246 



178 



93 



114 



75!l640;i534 +106 



1896 



134 



155 



71 



77 



103 



125 



143 



105 



106 



102 



55 



3512111230,- 19 



1897 



60 



69 



109 



85 



84 



119 



81 



113 



143 



101 



95 



54 



11131037:+ 76 



1898 



53 



42 



31 



60 



26 



77 



64 



78 



121 



86 



27 



56 



721 



8171- 96 



1899 



45 



38 



40 



45 



18 



51 



52 



44 



76 



42 



28 



19 



498 



604 



-106 



1900 



40 



13 



20 



32 



48 



36 



68 



56 



96 



60 



20 



54 



543 



398 



+ 145 



1901 



5 



8 



9 



2 



15 



26 



28 



33 



7 



2 



3 



7 



145 



295 



-150 



1902 



7 



3 



6 



4 



17 



12 



11 



13 



6 



1 



1 



2 



83 ! 305 



—222 



1903 



4 



13 



9 



21 



15 



17 



35 



33 



13 



16 



18 



10 



204 



3001- 96 



1904 



21 



12 



50 



35 



53 



55 



79 



115 



29 



35 



22 



44 



550 



800 



-250 



1905 



22 



37 



65 



24 



45 



53 



55 



96 



59 



18 



38 



7 



519 



1194 



-675 



Daily 



6-2 



1H3 



6-7 



6-6 



5-9 



6-2 



6-3 



6-1 



6-4 



6-7 



6-1 



5-9 



6-3 







Days 



13 



15 



16 



15 



18 



21 



26 



26 



20 



15 



14 



13 



212 







/ 



they are found in Tables IV, V, VI, under the columns 

 marked T (temperature), V (vapor pressure), B (barometric 

 pressure) respectively. 



The solar prominences and the European magnetic horizontal 



force. 



In order to procure other elements due to solar action with 

 which to compare the meteorological variations, the annual 

 numbers of the solar prominences and the annual amplitudes 

 of the European magnetic field have been selected. The num- 

 ber of the prominences, as recorded in the reports of the Ital- 

 ian observers, Osservatorio del Collegio Romano, and Catania,_ 

 were counted out month by month, and the numbers are given 

 in Table II. The annual sums are taken. The lowest line of 



