Or- 



76 PROCEEDINGS OF THE AMERICAN ACADEMY 



Yards. 



At 0° C. 



C. S. - Ri'i C. S. — Ri^ Ri'^ — RP 



div. div. div. 



—307.5 —60.0 +247.5 



—307.5 -56.5 4-251.0 



—310.5 —58.5 +252.0 



Means —308.5 —58.3 +250.2 



At 16°. 67 C. 



—51.4 —49.2 +2.2 



—51.5 —48.6 +2.9 



—54.8 —49.4 +5.4 



—53.2 —48.9 +4.3 



—52.3 —49.1 +3.2 



—53.0 —49.6 +3.4 



Means —52.7 —49.1 +3.6 



Hence : — 

 For aS.-B, h = -^^]-^± ^^ = -15.35 = —Q.75fx 



_J_O50 ^ 3 6 



E-B, h = ^ IIq^ = +14.80 = +6.51 ^ 



Convertiug these values into the equivalent values for 1 meter, we 



have 



For C.S.—B^ b = —7.38 ii 



C.S. — R^ b = —0.27n 



Combining these results, we have 



For 1 Meter. For 1 Yard. 



For T-aS. i = +1.43^ J = +1.31^ 



T—R^ b = —6.l0[i b = — 5.58^1 



T—R.^ b = -\-l.03[i 5=4-0.94^ 



aS.—R^ b = —7A6^ b = —G.S3ix 



aS.—R, b = —0.33{i b = —0.30fi 



R, — R, b = -{-7A3ix b = -]-6.52fi 



