1839] 



Terrestrial Magnetic Force in Southern India. 



239 



adopt with equal proprietv, the mean of Nos. I 

 and 4 (1° 38' 30"), or of Nos. 2 and 3 (1° 22' 

 20 ) a« the tnie dip. On consulting the previa 

 oas observation?, we find that they may be 

 brought to agree with the first of these vaUies, 

 by aUo-wing the second correction in Kos. 

 1,3 and 4, and the first correction in No. 2; 

 whereas to reconcile them wdth the second va- 

 hie found above, we must admit the third cox- 

 rection in Nos. 1 and 3: and the second in No. 

 4. Hitlierto the minor correction only having 

 been found sufficient to reconcile the observa- 

 tions made by myself, I think it little likely 

 that iJte third ccrection sJwiild ctpji^y tiv'ice at 

 the same slation, particularly as the observa- 

 tions on the second day were made with more 

 than ordinary care on account of the disagree- 

 ment met with on the first day of observation: 

 or, it would appear on the whole that the most 

 probable value for the true dip will be found, 

 by allowing the first correction in Nos. 2, 6 

 and 7; and the second correction in Nos. 1, 3 

 5 = + r 42' 10") and 4. 



Manargoodij. — One or the other of these observations probably repre- 

 / ^ = -t" 0° 39' 8"\ senfs the true dip, in which case the other ob- 

 \ 01 -|- 1 3 38 / servations requires the minor correction. 



Puttoocottali. — The mean of these is probably pretty near the truth. 

 (•.• ^ = +0° 0") 



Mmiamalejoodf/.— 'The mean of these is probably pretty near the truth, 

 (/. ^ — 4- 0^ 10 3i") 



Kalehenary.— Do. do. ^ = -f 0® 6' 22", 

 Ramnad. — ■ Do. do. h — I'' 24' 42" 



Paumhmi.—^o. 4 appears to require the minor correction. 

 (.-. ^=:— i° 35' 30") 



