313 Horary Meteorological Observations at Trevandrum [A.PRIL 

 3c?. — At the Trevandrum Observatory. — By John Caldecott, Esq« 



Date. 



Mar. 21 



1 



Hour. 



Barom. cor- 

 rected for 

 temr.of32° 



Thermr. 



I Depression 

 I of wet bulb. 



! Direction 

 j of wind. 



Remarks. 



— . 











o 



0 











6 A. Mi 



29.917 



TQ A 





Pol™ 









7 





.914 



77-8 



A t\ 



4.U 



N. 



Light air. 







8 





.914 



78.4 



0.0 



jj 



>> ?> 







9 





.947 



80.1 



/.b 



N. by w. 



Increasing. 







10 





.956 



82-7 



0 7 

 y.7 



N. N. W. 



Fresh breeze. 





11 





.946 



QA Q 



J.O 



jj 



» 



Strong 



jj 



0 



Noon 





.911 



or* c 



y.y 



N. W. 



j> 



W> 



1 P. M. 





.889 





y.i 



jj 



it 



j> 



O 



2 





.876 



8/. 



J.O 



jj 



jj 



jj 



C3 



3 





.868 



oO.O 



IU.U 



jj 



jj 



j> 



^3 

 bp 

 — i 



4 





.850 



OC Q 



O Q 



y.o 



jj 



jj 



jj 



5 





.852 



oJ.o 



Q A 



y.4 



Jj 



Moderate 



jj 



fcT 



0) 



6 





.874 



<>±.y 



ft ^ 



jj 



Gentle 



jj 



T3 



C3 



7 





.877 



QQ !=v 



/.u 



>» 



Jl 



jj 



jj-J 



8 





.902 



oo.U 



0./ 



jj 



JJ 



jj 





9 





.920 



OO.U 



c 7 

 0./ 



jj 



Very light 



jj 



O 



10 





.902 





/o 



V/dllYl. 



jj 



jj 



| 



11 





.903 





^ Q 



JJ 



» 



jj 





Midnight 





.895 



Ql A 

 01.4 



O.O 



JJ 





jj 



O 



1 A. M. 





.892 



Qn 7 



Pi Q 

 O.o 



n. by E. 



Gentle 



jj 



To 



2 





.885 



7Q C\ 



4 y.o 



^ ft 

 O.o 



jj 



jj 



jj 



0 



3 





.879 



TO A 



7 

 0.7 



jj 



jj 



jj 



-t-» 



4 





.880 



7Q 0 

 / O.Jt 



a ft 

 O.o 



?» 



Increasing 



jj 





5 





.871 



79 0 



7 8 



» 



Fresh 



jj 





6 





.866 



78.9 



4.2 







jj 



3 



7 





.866 



78.8 



4.1 



» 



Light 



jj 





8 





.894 



80,0 



4,5 



jj 



jj 



jj 



>» 



9 





.894 



81.8 



6.5 



ff 



Increasing 



jj 





10 





.908 



83.8 



8.3 



N. 



Moderate 



jj 



jo 



11 





.826 



'85.0 



12.7 



N. N. W. 





jj 



rb 



Noon 





.879 



88.0 



10.5 



N. W. 



Fresh 



jj 



a 



1 P. M. 





.840 



83.5 



10.0 



jj 



jj 



jj 



cS 



>* 



2 





.824 



88.8 



10.5 



jj 



Light 



jj 





3 





.818 



88.5 



11.5 



jj 



jj 





4 





.802 



88.1 



10.4 



jj 



jj 







5 





.807 



87.9 



10.4 



JJ 



Very light 



air. 





1 6 





.836 



86.3 



8.1 



j> 



jj 



jj 





The barometer used in these observations is a chamber one by Wrench ; and from 

 comparison with a fine syphon barometer made by llobinson, it appears to be an in« 

 strument worthy of confidence. 



The correction for temperature is deduced from the formula t — 320 x 003 B 

 with the addition of .075 as the constant for capillarity. 30 



The thermometer is a standard by Troughton, and the indications of the wet bulb 

 thermometer are reduced to it. 



The time is the true mean time of the Trevandrum Observatory, in Lat. 8* 30m. 3os a 

 north— Long. bh. 8m. 00s. east. 



The elevation of the building in which the observations were made is not yet well ascer- 

 tained, but may be assumed, without a possibility of much error, at 50 feet above the level 

 of the sea (which is about two miles distant from the Observatory)— the heights of the 

 mercurial column in the list are therefore those due to this elevation, 



