340 



PROCEEDINGS OF THE AMERICAN ACADEMY 



?F^VA </ie Universal Comparator. 



Equations of Conditions between T""- and E^^ 



(With 1-inch objective.) 



Date. 



1882. 



Apr. 26 

 " 27 

 " 28 

 " 30 



May 8 

 " 12 

 " 20 

 " 23 



1 (liv. = OAiO[i. 



7'»2 — /?,»2 



+401.5 div. 

 +396.8 div. 

 -1-391.7 div. 

 +392.3 div. 

 +393.9 div. 

 +380.0 div. 

 +372.8 div. 

 +375.2 div. 



Normal Equations. 

 +3104.2= +8 a —55.37 6 

 —22062.0 = —55.37 a + 823.30 6 



6= —1.31= -0 58/* 

 a= +378.9 = +166.0/* 



