228 Gould's Report on. Trans-Atlantic Longitude. 
Art. XXVIIL—Notice of Dr. Gould’s Report on the Trans- 
Atlantic Longitude.* 
Dr. Gouxn’s able Report on the trans-Atlantic longitude has 
at last been published. It is full three years, however, since the 
field work to which it relates was finished, and more than two, 
itself, and laying some of its points before the readers of this 
Journal. 
The paper fills a hundred quarto pages of the Smithsonian 
ntributions, and is one of the most important yet published 
on telegraphic longitude. For not only was the undertaking t? 
which it relates among the most difficult and delicate, as well as 
important, ofits kind, but the party put upon it brought to their 
task nearly the sum total of all the experience and ractical skill 
that had then been developed in this special field. ; their chief 
having for fifteen years had exclusive charge of the longitude 
peeons of the United States Coast Survey, and his associa! 
likewise, a long training in the same service. e Report may 
be taken, therefore, as a good exemplification of the telegraphic 
method in one of its latest and most difficult applications, and 
at the same time, as but a sample of the vast store o milar 
material that has been accumulating under the same hand from 
the entire longitude work of the Survey—material which e™ 
braced, fore the war, no less than twenty-four independent 
terminations in the Atlantic and Gulf R ates—and which, 
surely, ought not to be much longer lost to science. age 
_ The Telegraphic method, it is now well understood, is distine 
tively American, and has had its chief development in the work 
of our great national Survey. That Survey has, in fact, amon 
its many important contributions to science, given to the worl 
__* Tho Trans-Atlantic Longitude, as determined by the Coast Survey Expedition of 
pA, A - to the Superintendent of ; vey. By Benjamin 
1869. New York: D. A 
