70 



OLDHAM: THE STRUCTURE OF THE HIMALAYAS, ETC. 



complete group of stations in and around the Dehra Dun ; it will, 

 however, be best to defer the consideration of these observations 

 and confine attention to the southerly continuation of the series, 

 across the alluvial plain. This series forms a double line of sta- 

 tions stretching across the alluvium and ranged on either side of 

 the 78° meridian, which will be most conveniently treated as two 

 separate series and are given in the table No. 20 in two columns, 



Table 20. — Latitude Stations near 78° Longitude. 





Distance from 



Observed 



Deflections duo 



Station. 





Main Boundary. 

 32 



Deflections. 



to the Range. 



Sarkara . 





— 8 



— 6 



Nojli 









38 



— 10 



— 5 



Siraa 









56 



-5 



- 



Kaliana . 









58 



— 3 



— 2 



Bansgopal 









76 



— 1 



— 1 



Datairi . 









92 



— 2 





Boston . 









104 



— 1 





Sankrao • 









108 



H 4 





Chandaoe 









124 



+ 3 





Salimpur 









124 



+ 4 





Noh 









144 



+ 4 





Agra 









168 



— 1 





Usira 









2(H) 



— 2 





Clurmi 









200 



+ 6 





Majhar . 











+ 7 





Kosri 











+ to 





Algi 











+ 6 





Pahargarh 







+ 4 





of which the left hand one includes the western, and the right 

 hand one the eastern, stations ; the actual deflections are given, 

 and in the last column the amount of deflection attributed to the 

 attraction of the Himalayas. For two of the stations in this series, 

 Kaliana and Bansgopal, Major Crosthwait has calculated the effect 

 of the visible topography, of which the Himalayas form all but 

 a small proportion, and obtained a deflection oi — 3" at Kaliana, 

 as against — 2" in the table ; at Bansgopal the agreement is 

 complete. 



The eastern stations are situated well out in the alluvial plain 

 and exhibit much the same features as the series near the 81° 

 meridian. The point of passage from the northerly to southerly 



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