, r 0N THE MERIDIAN. |l 



At the commencement, the old chain exceeded the new 

 one 18.18 divisions of the micrometer, equal .00728 feet. 

 Therefore 323Xio°- 00 7 28 ^ eet w ^ ^e tne measure in Feet. 



terms of the new chain - - - — '■■-;.'.- .^' .■-' -■• ■- =32302.3524 



At the conclusion, the old chain exceeded the new oiie 

 25 divisions, and had therefore increased 6.82 divisions, 



O02T3 f ? 



-equal .00273 feet. Hence 323 X ~f-=o.^o9 teei, the 



correction for the wear, which add - ...... - - - -j- 0.4403 



The sura of the deductions from col. 4th is 485778 

 feet, vhich being increased in the ratio of 100 to 100.007s 

 will be 4.8581 feet, which subtract -.-.------_ 4.8581 



Hence the apparent horizontal distance will be-- ■'--,- - 32297.9342 



The correction for the expansion & reduced to the stand- 



ard temperature of 62 will be v - ~ ■ 



X 32297.9342 feet, which add - -_--_--- -j- 47744 



Hence the corrected measure of the Base for the tem- 

 perature of 62 will be - „_«_-»,-.-« = 32302.7086 



Which, being reduced to the level of the sea, will be - 32301.2769 



The last reduction is applied to the S. E. end of the Base, which 

 is nearly the mean height of all the hypothenuses, and is 925.5 feet 

 above the Jevel of the sea; which height was determined by bringing 

 down the triangles from the station at Bodagoontah. 



D 



