86 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. "9 



bination |(9'^ + 2i'' + Max. + Min.) by means of the 

 corrections given in Taljle A, based on the observa- 

 tions for the period 191 1 to 1920. 



From 1891 to 1893 the vahies given are the means of mean 

 daily maximum and mean daily minimum corrected 

 to the combination |(9'^-|-2i'^ + Max.-|-Min. ) by 

 applying the corrections given in Table A. 



From 1901 to 1910 the values given are the direct means 

 J(9h + 2ih + Max. + Min.). 



From 1911 to 1920 the values are ^(8'^ 4i"^ + 2o'> 41'" + 

 Max. + Min.) except during April to October 1919, 

 which are J; (71'^+ 194" + Max. + Min.). No cor- 

 rection appears to be necessary to the values for 

 these seven months. 



Table A. — Corrections to Reduce Temperature to the Combination 

 i Cp'' + 21" + Max. + Mill.) 



Jan. Feb. Alar. Apr. May Jiiue July Aug-. Sept. Oct. Nov. Dec. 

 °F. 



gh — 0.1 — 0.1 — 0.5 — 0.9 — 1.0 — 1.0 — ].o — 1.1 — 1.1 — 1.1 -r-0.8 — 0.3 



•KM + m) —0.2 —0.2 —0.2 —0.2 —0.1 —0.1 —0.1 —0.1 —0.2 —0.2 —0.2 —0.2 



Rainfall. 



Authorities: 



1887 to 1890. From a rainfall series compiled by W. H. 

 Potter and published in the Monthly Weather Re- 

 view, vol. 53, 1925, p. 24. 



1 89 1 to 1893. As for Temperature. 



1894 to 1920. As for Pressure. 



In the years 1866 to 1886, a few values, not obtainable in 

 manuscript, were taken from the same authority 

 as 1887 to 1890. The values so obtained are 

 in italic. 

 Site: The station was removed from St. George's to Hamilton 

 (Prospect Hill) Ijetween November 1869 and 

 March 1870. The rainfall amounts for the years 

 1866 to 1869 are probably not comparable with 

 those from 1870 onwards. 



CANARY ISLANDS (LA LACUNA) 



Authority. 



Observatorio Central Meteorologico. Madrid, Spain. 

 Pressure. 



After investigation it was decided that the pressure data were 

 not sufficiently reliable for inclusion. 



