\ 
Review of the Results of the U. S. Coast Survey. 249 
Arr. XXV.— Review of the Operations and Results of the United 
| States Coast Survey. 
[Concluded from p. 83.} 
Sal of these an immense amount of labor is bestowed, 
tae value of the work consisting chiefly in the accuracy of the 
etails. In fact the whole subject may be fairly considered as 
me once settled, and the triangulation and plane-table work 
0g finished, the maps are drawn and the work of the engraver 
Ms e. e pr 
Mary charts serve nearly the same purpose as the sketches, but 
Tees. They embrace the shore line, the interior as far as the 
ta main road, and the hydrography for about fourteen miles’ 
theshore. The second class embraces what are termed off- 
mes atchorage, & ibiting the soundin 
th ge, &c., exhibiting the so ; 
in utline of the shore, the topography of th 
dhivts: presenting the complete results of the survey. 
SOND SERIES, VOL. XXV, NO. 74,—MARCH, 1858. 
32 
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