Gould’s Report on Trans-Atlantie Longitude. 241 
comparisons were made between the observers for this Se 
i the values 
Gould—Mosman ‘=o 
ean— Mosman =+ 0°11 
Goodfellow—Dean =+ 0°14 
Boutelle—Goodfellow =— 0°14 
Boutelle—Chandler =— 0°04 
ela consequence. 
ts for longitu oy 
Heart's s Content we have for the 
several dates, after corrections applied :— 
1866, Oct. 25, 2" 51™ 56°-457 
sae 468 
Nov. 5, 455 
6, 481 
9, 460 
The final longitude deduced, after correction for personal 
equation in determining time  Dean—Mosman=: +0* 11, and in 
hoting signals, Dean ould=s +0°-08, becomes 
A—2" 51™ 56554 
Between Heart’s Content ae Calais, the results, similarly cor- 
rected, are for the several _ 
Dee. 11, ote 55™ 37°93 
12, 53] 
14, 87°84 
16, 37°82 
d the final result, corrected by —0*14 for personal equation 
mee Boutelle a Goodfellow, and omitting Dec. 12, is— 
A=0" 55™ 37°°72 
Between Greenwich and Foilhommerum, the longitude was 
obtained b: by oS signals on two nights, and compared 
With two previous determinations by Mr. Airy for other points 
at slcds, by short geodetic connections. The two nights 
es gave 
Am, Jour, Sor—Szconp — Vou. XLIX, No. 146.—Manrcg, 1870. 
