50 



important in- announced ; and hence such information, though first dis- 



formation for- - , . n 



warded to for- covered by American vessels, and first received bv the 



eisn offices for rT . , _... . _^ l 



publication for United States Hydrographic Office, was often forwarded 

 to the hydrographic offices of foreign Governments and by 

 them made known to the world. 



the office tions ° f Durin £ the y ear there were published sailing directions 

 for " Kattegat Sound and the Great and Little Belts to the 

 Baltic Sea," compiled by Commander William Gibson ; for 

 u The Coast of Brazil from French Guiana to Bio Janeiro," 

 translated by Lieut. H. H. Gorringe, with a supplement, ex- 

 tending from Bio Janeiro to the Bio de la Plata, by Lieut. 

 Seaton Schroeder; also a set of "Arctic Azimuth Tables for 

 parallels of latitude between 70° and 88°," by Lieutenants 

 Schroeder and B. Wainwright. Thirty- six charts were pub- 

 lished, of which fifteen were engraved and twenty-one lith- 

 ographed. Among those engraved were several of the sur- 

 vey in the Pacific by the officers of the Tuscarora. 



FISCAL TEAR ENDING JUN 30, 1882. 



increased de- The growing demand for charts and other publications 

 ™r^phic° r H offic°e of tne Hydrographic Office, together with the activity of 

 publications. our naval vessels in making surveys and forwarding the 

 data for publication, entailed upon the Office constantly in- 

 creasing labors. 

 international ^- n international system of exchange of hydrographic 

 oF te exchan P in d ^ n ^ orma ^ ou ' anc ^ ^he euer gy with which foreign Govera- 

 fo y rma§on phic in " men t s were carrying on extended surveys and investiga- 

 tions, kept the Office in constant receipt of reports of dis- 

 covered dangers and changes. The labor of keeping cor- 

 rected to date the charts, chart plates, sailing directions, and 

 light-lists, and of preparing new charts, issuing Hydro- 

 graphic Notices, Notices to Mariners, &c, was so great that 

 the small force which the limited appropriation permitted 

 to be employed proved entirely inadequate. As a conse- 

 quence, results of surveys and information of the highest 

 importance to the commercial world remained in the Office 

 unpublished. As far as the appropriations permitted, the 

 engraving of charts was continued ; and in cases where the 

 want of funds made this impossible, and yet the demand 

 for the charts required their immediate issue, recourse was 

 still had to the process of photolithography. 



