WHOLK VOL. NOTES. NORTH ATI-ANTIC lOI 



1887 January to May. Appendix to Report on the Botanic 

 Gardens, Trinidad, for 1887. 



1887 Tnne to 1899 November. Manuscript returns com- 

 municated by the Superintendent, Botanic Gar- 

 dens, and filed in the Meteorological Office, London. 



1899 December to 1906. Reports on the Botanic Gardens. 



1907 to 1908. Meteorological returns for the Royal Botanic 

 Gardens. 



1909 to 1920. Trinidad Blue Books. 

 Site: The observations were taken at St. Ann's where the 

 barometer was at a height of 133 ft., from 1862 

 to 1900 June, and at St. Clair Experiment Station, 

 where the barometer was at a height of 72 ft., 

 from 1900 July to 1920. 

 Changes of Instnuucnt: The instrument in use up to 1884 is 

 unknown. In 1887, there were three barometers: 



Negretti & Zambra with index error correction . . None 



Adie's Marine with index error correction -(-.001 in. 



Callaghan Standard with index error correction. . —.005 in. 



It is not known which Ijarometer was used, but it is pre- 

 sumed that the necessary corrections have been 

 made. 



In 1925, l)arometer Adie, London, 292. with no known index 

 error correction was in use. but it is not known 

 when this barometer was taken into use. 

 Changes of Hours of Observation: 



1862 Fel)ruary to 1884. 9^'^ and 15.I''. 



1887 January to March. 9'' and 15''. 



1887 April to 1920. 7'^ and ]5'\ 



All values have been corrected to the mean of 24 hours by 

 corrections (Table A) based on observations at 

 Barbados. 

 A'oles: On page i of the 1888 Report on the Botanic Gardens, 

 Trinidad, it is stated that the pressure values pre- 

 vious to January 1889 are too low by .1 18 in. This 

 correction of -f.ii8 in. has been applied from 

 1862 Fel^ruary to 1888 December. 



In a report on the station received in the Meteorological 

 Office, London, in 1925, it is stated that the height 



