HYDROGRAPHY. 187 



pages of hydrographic notices; new editions of sailing direc- 

 tions for the Mediterranean ; directions for the Dardanelles 

 and Black Sea, the west coast of Scotland, and the "Australia 

 Directory;" 62 new charts have been published, 1896 have 

 been corrected, and 180,000 have been printed and disposed 

 of for the use of navigators. 



Under the direction of the Indian Government, English na- 

 val officers have also been busily at work on the surveys of 

 the coasts of India and Burmah, extending the incompleted 

 charts of the coast, and re-surveying those ports and harbors 

 in which natural and artificial changes are constantly being 

 effected. 



Under the direction of the French Ministry of Marine, ex- 

 tended surveys have been made on the coasts of France, es- 

 pecially of the approaches to the ports of Boulogne, Rochelle, 

 and St. Jean de Luz, to determine the changes in depth and 

 position of the various channels. 



In the Gulf of Siam, French surveyors are busily at work 

 in exploring and surveying; here, as elsewhere, increased 

 commerce being accompanied by an urgent need of exact 

 knowledge of the shores. 



Detailed charts will soon be published of the recently com- 

 pleted surveys by MM. Herand and Bouillet in 1873-4-5 

 of the delta of Tong-kin. 



Charts of the coasts of Tunis and Tripoli from the survey 

 recently completed by Captain Mouchez are in course of 

 preparation, and will be shortly published on a scale of 5U i o 



In 1 addition to these surveys, the French Depot de la Ma- 

 rine has continued, as heretofore, the publication of corrected 

 charts and nautical books. Eighty -two charts have been 

 published of various parts of the globe, and a number of 

 most valuable nautical books, including the " Annales Hydro- 

 graphiques," issued quarterly ; the " Livret des Phares ;" " Re- 

 cherches Chronometriques;" sailing directions for the north 

 coast of France, for New Caledonia, and for the mainland of 

 America from Guiana along the shores of the Caribbean Sea 

 and Gulf of Mexico to the south point of Florida. 



Under the auspices of the Imperial German Hydrographic 

 Office, a re-survey of the shores of the German Empire has 

 been commenced. 



In the Baltic Sea the hydrographic portion of this work is 



