OP ARTS AND SCIENCES. 371 



Normal Equations. 



—1999.6 = +38 a + 394.2 6 6 = +0.63 = +0.28 fi 



—19663.9 = +394.2 a + 5807.16 a = —59.2 = —26.0/4 



From 



.. T—aS. h = —l.Mix. 



Whence from 



C.S. — R., & = -1-0.33 /x 



"We have, therefore, 



For 1 yard, b = +Q-28m + 0.30/x ^ ^^ ^9 ^ = +0.69 div. 



For 1 meter, b = +0-^-V4-0-31/x ^ _^q^^,^ ^^ ^ _^^_^3 ^.^^ 



