1836.] 



Horary Observations of the Barometer, #c. 



51 



IV. — Horary Observations of the Barometer, Thermometer, and Wet-bulb 

 Thermometer, made at Calcutta on the 2\st and 2'2nd of December, 

 1835, by Mr. H. Barrow, Astr. and Math. Inst. -maker to the H. C. 



[Having ourselves inadvertently omitted the hourly observations appointed 

 by the Meteorological Association at the Cape to be taken on the above day, 

 we are most happy in being able to supply the omission from Mr. Barrow's 

 register. As the Barometer registered monthly at the Assay office stands .014 

 higher than Mr. B.'s, that quantity must be added to the Bar. indications at 32° 

 (in col. 7) to produce an accordance. — Ed.] 



The barometer and wet-bulb thermometer were in a large room to 

 the north, the doors and windows of which were open during the whole 

 time. In the reductions* *030 has been used as the constant for cap di- 

 ary attraction, and it is only necessary to add that the barometer is of 

 the mountain construction, with a screw at the bottom to bring the 

 surface of the mercury to zero. 



{Calcutta mean time.) 









Attach- 





Exter- 



Barome- 



Depression 





1835. 



Hour. 



Barome- 



ed Ther- 



iWet-bulb 



nal 



ter re- 



of Wet- 



u 



Date. 



ter. 



mome- 



Thermo- 



Thermo- 



duced 



bulbTher- 











ter. 



meter. 



meter. 



to 32°. 



mometer. 



O > 



21 Dec. 



6 A. M. 



H),00S 



65,0 



63,0 



55,0 



29,937 



2,0 



H. B. 





7 



,024 



62,2 



61,0 





,963 



1,2 



E. B. 





8 



,038 



64,0 



62,0 



62,0 



,972 



2,0 



H. B. 





9 



,068 



66,7 



63,0 



66,0 



,993 



3,7 







10 



,070 



68,3 



63,9 



69,5 



,991 



4,4 







11 



,054 



69,8 



64,0 



71,6 



,971 



5,8 







Noon. 



,030 



70,1 



63,9 



72,2 



,946 



6,2 







1 



29,990 



70,9 



62,5 



73,1 



,903 



8,4 







2 



,974 



71,1 



62,0 



73,2 



,883 



9,1 







3 



,972 



71,6 



62,2 



73,5 



,883 



M 







4 

 5 



6 



,972 



71,0 



62,1 



72,0 



,885 



8,9 







,989 



69,2 



63,7 



66,2 



,907 



5,5 







7 



30,012 



68,0 



64,5 



64,0 



,934 



3,5 







8 



,028 



67,0 



64,5 



63,1 



,953 



2,5 







9 



,037 



67,0 



64,0 



62,0 



,962 



3,0 







10 



,040 



66,3 



64,0 



60,8 



,967 



2,3 







11 



,030 



66,0 



63,5 



59,5 



,958 



2,5 





22nd. 



Midnight. 

 1 



,016 



65,4 



63,0 



59,1 



,946 



2,4 







2 



,000 



65,0 



63,0 



58,0 



,931 



2,0 







3 



29.9S4 



64,0 



62,0 



58,0 



,918 



2,0 







4 



,982 



64,0 



62,0 



57,0 



,916 



2,0 







5 



,986 



62,8 



61,8 



57,0 



,924 



1,0 



E. B. 





6 



30,012 



62,9 



61,5 



57,0 



,949 



1,4 







7 



,016 



62,2 



61,0 



57,2 



,955 



1,2 







8 



,036 



63,2 



61,8 



61,0 



,972 



J, 4 



H. B. 





9 



,064 



67,0 



62,0 



66,9 



,989 



5,0 







10 



,068 



69,1 



63,5 



70,5 



,987 



5,6 







11 



,040 



70,5 



63,0 



73,0 



,954 



7,5 







Noon. 



,020 



71,9 



63,0 



74,0 



,930 



8,9 







1 



,000 



72,2 



63,0 



75,0 



,909 . 



9,2 







2 



29,980 



72,1 



63,0 



75,3 



,890 



9,1 







3 



,968 



72,9 



63,9 



75,3 



,875 



9,0 







4 



,972 



72,3 



63,0 



73,5 



,S81 



9,3 







5 



,977 



71,9 



63,0 



71,0 



,887 



8,9 







6 



30,000 



70,5 



63,6 



67,5 



,914 



6,9 





* Of column 3, but not of column 7, which is fortunate, as we do not apply 

 any correction for capillarity in our own register. — Ed. 



h 2 



