Our country and its resources; . revo-lutionized all such work. No mat-ter how closely soundings may bemade of a harbor, for instance, it isimpossible to be certain that allsunken rocks, wrecks, shoals or otherobstructions to navigation have beendiscovered. But with a submergedwire drag of a known depth, draggedthrough the water between twowidely separate vessels, a positiveresult is obtained resulting in asecurity beyond price to tin1 mariner. In its work the Coast Surveysends out numerous parties whichwork along the coasts, or, if trian-gulation or leveling is being done, 128 nil! COUNTRY AN
Our country and its resources; . revo-lutionized all such work. No mat-ter how closely soundings may bemade of a harbor, for instance, it isimpossible to be certain that allsunken rocks, wrecks, shoals or otherobstructions to navigation have beendiscovered. But with a submergedwire drag of a known depth, draggedthrough the water between twowidely separate vessels, a positiveresult is obtained resulting in asecurity beyond price to tin1 mariner. In its work the Coast Surveysends out numerous parties whichwork along the coasts, or, if trian-gulation or leveling is being done, 128 nil! COUNTRY AND ITS RESOURCES in the interior. Many vessels areused for coast work, including thesteamers Bache, Endeavor (nowsold), Hydrographer, IsLs, Ex-plorer, G edne y, McArthur,Patterson, Taku and Yukonand the schooner Matchless. In the Philippine Islands five ves-sels aid the work of the survey, re-porting to the suboffice at work is prosecuted partly withfunds of the survey and partly withfunds from the Philippine Govern-. PLANE TABLE WORK IN THE WATERIN THE PHILIPPINES in. ill. which also furnishes four ofthe five vessels engaged. The shipsare the Pathfinder, Marinduque,Romblon, Fathomer and Re-search. li is difficult, if not Impossible, tocover in a few words the extensiveand varied work of a bureau whichrequires :i closely printed report of156 pages to Show a years activi-ties. Bu1 in spite of the fad thatthe determination of astronomic latitudes, the determination ofgravity intensity, the prosecution oftriangulation, the wire-drag hydro-graphic work which last year dis-covered and charted hundreds ofshoals and obstructions to naviga-tion, the coast pilot work, the tidaldetermination and publications, theassistance rendered vessels and mar-iners in distress, the precise level-ing, the special surveys and specialservices rendered by the bureau, thedetermination of magnetic elements,dip, declination and horizontal in-tensity made in .31 States, are allhighly important, i
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyo, bookyear1917
