of the Plumb-line in India. 17 
multiply our results by the cosine of 45° for the purpose of 
comparison. 
It must be borne in mind that the object of this investi- 
gation is one of principle, and that no exact accordance with 
the results of the Survey is to be expected, because the 
natural data cannot be presented in a form amenable to 
mathematical treatment. 
The following isa summary of the results of the hypothesis. 
At the foot of tke slope. 


Deflexion due to the slope ..........6....... 39-484 
= = plaleaan,, sas.ate/o2. 44°396 
Total due to the visible masses ... 83°880 
Negative deflexion due to the root ......... 68°189 
Residual deflexion towards the range...... Pxooe 


At sixty miles from the foot of the slope. 

Deflexion due to the Sheps sid ead sed 17-384 
é 2 pluteatinns. 25 lnk. 33006 
Total due to the visible masses ... 50-390 
Negative deflexion due to the root ......... 49°275 
Residual deflexion towards the range ...... 1115 


At 293 miles from the foot of the slope (representing 
the position of Kalianpur). 

Deflexion due to the slope .................. 4-934 
_ - plates | haere ce cr 14°691 
Total due to the visible masses ... 18°925 
Negative deflexion due to the root ......... 19-110 
Residual deflexion away from the range... 0°185 
In order to discover how nearly the hypothesis made 
regarding the form, dimensions, and position of the mass 
taken to represent the mountain, agree with those of the actual 
highlands as regards their horizontal attraction, we may 
reduce the deflexions thus obtained to the meridian by multi- 
plying them by cosine 45°, and compare the results with the 
Phil. Mag. 8. 6. Vol. 7. No. 37. Jan. 1904, C 
