ONTHE-MEREDIAN. > 35 



5C>^ becaufe th* quantity ,00345 feet could not be fenfibly affefled by 

 ^ny change of temperature. Then if to the above be added the excefs 

 of the meafuring chain above the other, that is ,01218 feet, and the 

 whole multiplied by 326, we fhall have the apparent length of the bafe 

 in tnis cafe 32605,0954 feet, which is -mod probably nearer the truth 

 than the former allowance which gives the apparent length 32605,2853 

 feet, for if this be made ufe of, with its correal ions, to compute back 

 to the bafe near Bangalore, it would bring out that bafe upwards of 

 two feet more than it meafured, which would indicate that there mud 

 have been an excefs in the Ilandard chain, above 100 feetg as far back as 

 2804, which is not probable, if it has been corrediy laid off in Londoiu 



Taking therefore all therecircumflances into consideration, 



we will take the apparent length of the bafe near Gooiy 32605,0953 

 The correftion for the wear equal - - -4-0,3879 



The corredlion for reducing the bafe to the horizontal dif- 



tance will be „ . - » » - __ 0,4365 



Hence the apparent horizontal diftance will be • - 32605,0464 

 The corrs«5lion for the expanfion and reduced to the flan- 



dard temperature of 62° - - - .^5.44201 



Hence the correft meafure of the bafe .. - 32610,4893 



Which being reduced to the level of the fea ^ 32608,644^ 



