384 



PEOCEEDINGS OF THE AMERICAN ACADEMY 



Date. 



1883. i?i'2 — G^^ 



July 10 +53.6 div. 



" 10 +55.1 div. 



" 11 +58.3 div. 



" 11 +54.6 div. 



" 12 +54.0 div. 



" 12 +59.5 div. 



" 13 +53.7 div. 



" 13 +53.4 div. 



7?1»2 — G2»2 



+55.9 div. = 



+69.4 div. = 



+63.1 div. = 



+56.1 div. = 



+61.2 div. = 



+62.8 div. = 



+63.5 div. = 



+61.8 div. = 



At 16^.67 C. 

 (t — 0)° i?i='2 — G^H HiH — Gj^ 



a +19.53 



a +19.49 



a +19.11 



a +19.13 



a +19.20 



a +19.07 



a +19.08 



a +19.08 



+40.7 div. 

 +42.4 div. 

 +47.3 div. 

 +43.5 div. 



+42.6 div. 



+48.7 div. 



+42.9 div. 



+42.6 div. 



+43.0 div. 



+56.7 div. 



+52.1 div. 



+45.0 div. 



+49.8 div. 



+52.0 div. 



+52.7 div. 



+51.0 div. 



Normal Equations. 

 For i?i»2 — Gj'i For J?i»2 — G^^i 



+788.1 = 31 a + 400.6 b +926.3 = 31 a + 400.6 6 



+22821.6 = 400.6 a + 8141,3 b +25256.0 = 400.6 a + 8141.3 b 



b = —4.27 b = —4.48 



a = —29.8 a = —28.0 



COMPARISON OF YARDS 7?i^ G,'^, AND G/^ WITH UNIVERSAL 



COMPARATOR. 



