Meafurement of a Bafe en Hounflow-IIeatli. 



437 



By examining the preceding table, it will appear, that the 

 total expanfion on the 1370 deal rods, including the fmall 

 equation for the lengthening of the ftandard, amounts to 

 24.223 inches, or 2.02 feet; which being added to the appa- 

 rent length of the bafe 27404.31 feet formerly obtained, we 

 fhall have, for the hypothenufal length, 27406.33 feet: and 

 from this deducing 0.07 foot, the excefs of the hypothenufal 

 above the bafe line, or the redu6lion contained in the feventh 

 column of the general table of the bafe, there will remain 

 27406,26 for thediftance given, by the deal rods, between the 

 I centers 



