APPENDIX. 



Feet. 

 Level of" Fossil beach" of Dr. McClelland, under the village of Mawm'luh, 



(" Cyrtoma" beds) 2974 



Level of Fossil beds, above Teriaghat, 352 



Teriaghat, above Sea, 128 



Top of Metamorphic Eocks, South end of the Cherra Valley, 21.55 



Ditto ditto ditto, three miles further to the North, 2913 



Living Bridge, near junction of the valleys of Temshung and Mawsmai, .... 977 

 Bamboo Bridge, about three miles to the North in the same Valley, ... 2311 



Maw-ring-rin, (three large stones on ridge North of Cherra), 4823 



Top of Waterfall, North end of Cherra Valley 4860 



Level of Assam Koad, at small toU house. North end of Cherra Poonjee 



Native village, 4428 



Native village of Cherra Poonjee, from, 4397 to 4572 



Bottom of zig-zags, on road to Teriaghat, 1428 



Level ground below ditto, sandstone abounding in shells, 750 



The above elevations have all been determined from observations made with a 

 mountain Barometer of Newmar's latest construction, and obtained from the Mathe- 

 matical Instrument Department, Calcutta, and observed synchronously with another 

 stationed at Cherra Poonjee. The elevation of the Bungalow which I occupied there 

 (in 1851) was obtained from the average of 112 observations, synchronous with those 

 made at the Surveyor General's Office in Calcutta : the instruments used in my observa- 

 tions having been carefully compared with those in Calcutta, and reduced to the 

 same standard. 



The elevation of this point at Cherra Poonjee, having been thus established as 4118 

 feet above the level of the sea (or above the datum determined for Calcutta, namely 

 18.11 feet below the cistern of the Standard Barometer there), the elevations of all 

 the other localities have been determined by adding, or subtracting from this ascertain- 

 ed height, the difference of elevation due to the different readings of the Barometer. 

 This has been done in preference to comparing each observation with the Calcutta 

 readings as being much more likely to afford correct results. The greatest elevation 

 reduced from the Cherra observations was 4144 feet ; the lowest 4065. 



