THE SMITHSONIAN INSTITUTION. 

 TABLE No. 4. 



209 



Observations for twenty-four successive hours, taken on the 22d of 



September, 1855. 



Hour. 



4 n. Ill 



') a. m 



(> a. m 



7 a. m 



5 a. m 



y a. m 



10 a. m 



11 a. m 



12 m 



1 p. m 



2 p. m 



3 p. m 



4 p. m 



5 p. m 



€ p. m 



7 p. m 



S p. m 



9 p. m 



10 p. m 



11 p. m 



12 p. m 



1 a. in 



2 a. m 



S ft. m 



4 a. m 



Barometer. 



IncheA. 

 21). 1)0 

 29.89 

 29.86 

 29. 88 

 29.90 

 29. 93 

 29. 93 

 29. 90 

 29. 89 

 29.90 

 29.90 

 29. 90 

 29. 92 

 29. 93 

 29. 93 

 29.92 

 29.92 

 29.92 

 29.93 

 29.93 



-29.92 

 29.92 

 29. 93 

 29.94 

 29.94 



Tlicrmom- 

 etcr. 



54 

 54 

 5G 

 56 

 59 

 Gl 

 65 

 66 

 68 

 09 

 72 

 73 

 72 

 70 

 67 

 66 

 64 

 62 

 58 

 57 

 56 

 55 

 55 

 54 

 54 



Clouds, their 

 course and 

 velocity. 



2— S. 

 2— S. 

 2— S. 

 2— S. 

 1— S. 

 1— S. 

 1— s. 

 1— s. 

 1— s. 

 1— s. 

 1— s. 

 1— s. 



















































0---- 



W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 

 W. 1 



Wind, direc- 

 tion and 

 force. 



S. 1.... 

 S. E. 1 

 S. E. 3 

 S. W. 3 

 S. W. 3 

 S. W. 3 

 S. W. 1 

 S. W. 1 

 8. 1 ... 

 S. E. 2 

 S. 1 ... 

 S. 1 ... 

 8. 1 ... 

 S. 1 ... 

 S. 1 ... 

 S. 1 ... 

 S. 2 ... 

 S. 3 ... 

 S. 3 ... 

 S. 3 ... 

 S. 3 ... 

 S. 3 ... 

 S 3 ... 

 S. 2 ... 

 S. 1 ... 



Dew-point. 



48 

 47 

 46 

 45 

 43 

 45 

 47 

 48 

 49 

 46 

 49 

 48 

 48 

 50 

 52 

 52 

 45 

 43 

 45 

 48 

 48 

 49 

 50 

 50 

 52 



Relative 

 humidity. 



.827 

 .802 

 . 729 

 .706 

 .600 

 .60S 

 ..574 

 . 574 

 .557 

 .494 

 . 493 

 .465 

 .479 

 . 540 

 .630 

 .648, 

 .555. 

 . 552: 

 .663. 

 .753 

 .77d 

 .824 

 .848 

 .876 

 .934 



Remarks. — The departure of the mean daily temperature from the average of the same 

 day for three years was 7.01° minus. 



The reading of the barometer varied 0.18 inch minus from that of the same day last 

 5'e«r, and 0.13 inch minus from that of the 22d fSeptember, 1853. 



The wind of the correspondinf^ day last year prevailed from S. W. fresh ; and although, 

 there was a slight sprinkle at daylight on the same day, the sky was clear for the remainder. 

 On the 22d September, 1853, the wind was high from the N. W.. and slvj. entirely cleaSv. 



14 



