514 
MR JOHN ALLAN BROUN ON THE HORIZONTAL FORCE 
TABLE II.—YerArty Mean HorizontaL Force at SINGAPORE (minus A CONSTANT), 



























WITH ITS MonTHLY CHANGE, 1842-45. 10= 
1842, 1843. 1844. 
Mean. | Change.| Mean. |Change.| Mean, |Change. | Mean. 
January, [0°54] 4.01 1491] 9.99| 22°33 0-99 | 32°15 
February, [1°75]} 4.94 15°71} 9.g9| 23°23] 9.9; | 31°89 
March, . 2:96 9:26 16-31 0:55 24-04 0-70 32°66 
April, 5:22) 1.58 16°86) 9.54 24:74 0-50 | 33°53 
| May, 680| 4.93) 17°40| 9.41| 25°24] 9.59 | 34°51 
June, 8:13 154 17°81 0-25 25:83 0°63 35°31 
July, 9-67 1-21 18:06| 9.98 26:46 0-62 
August, . 10°88 0:98 18-44] 6.6 27:08 0-84 
September, 11°86 0:87 19°04] 9.63] 2792) 9.94 
October, 12:73 0-72 19:67 0-70 28°83 0-84 
November, 13°45 | * 0.63 20°37} 9.93| 29°67 0-75 
December, 14:08 0:83 21:35 0:98 30°42 0-73 

TABLE I1].— YEARLY MEAN HorizontTAL FORCE (minus A CONSTANT), WITH ITS MONTHLY 









CHANGE AT TREVANDRUM, 1842-45. 1:00=- 9 
1842. 1843. 1844. 
Mean. | Change.| Mean. | Change.| Mean. | Change.| Mean. | Change. 
January, ; , ; 6-14 | _ 9.44) 410 | , 9.36 7°85 
February, 5°70 | _9.43| 4°46 40:22 8°53 
March, 5:27 _ 0-33} 4-68 40°04 9:18 
pel, re Lote, Ql #84:| e039) #72 | co-agin 2 Oe 
Man 760 | 40-53] 462 | 0-36 4°57 | 0-03 
June, 8:13 40°33 4:26 _ 0-55 4°54 +0°10 
July, 8-46 40-29 S71 | 0-49| 4°64 40-24 
August, . 8:08 | pra 822: | Sagal £80 nes 
September, 8°52 | 0:57 3°03 4.004 5°41 40°58 
October, 7°95 0-74 3:07 40:22 5°99 40°61 
November, 12. 29 0°67 3°29 40°34 6:60 40.65 
December, 6-54 | 0-40| 3°63 4047 7°25 +.0°60 



