66 



GEOGKAPHICAL POSITIONS. 



Captain Bayfiel'l assumed the longitude of the Dockyard, in his survey, to be 63° 37' 48" 

 as previously stated. The late Admiral W. F. Owen, in H.M.S. Columbia, in 1844, made it 

 63^ 35' 28" W. The late respected Lieutenant Raper made it, as a secondary meridian, 

 63"^ 37' 36", or nearly the same as Captain Bayfield. 



In the determination of this, and of other longitudes, the Electric Telegraph has 

 decided the question beyond controversy. 



The difference of longitude between Cambridge Observatory, Massachusetts, and that 

 of Halifax Dockyard, was determined, electrically, by Professor Bond, and Captain 

 Shortland, R.N., to be O** 30™ 9" in tkne, or 7° 32' 23-45" in arc. This meridianal difference 

 applied to the longitude of Cambridge, 71° 7' 58-55", as then determined, made Halifax 

 Dockyard Observatory to be in 63° 35' 35" W. of Greenwich. It is now considered to be 

 63° 35' 21", as given m the Table. 



4, Seal Island. — " M. Des Barres placed the southernmost point of the southern Seal 

 Isle in lat. 43° 25' 25", and long. 66° 0' 35". Later charts have it in lat. 43° 26' 35" ; but 

 our correspondent. Lieutenant Hare, gave the latitude of the South point 43° 22' 23", or 

 four miles more to the southward. This result, since confirmed, will account for so many 

 ships having been yearly cast away, on coming out of the Bay of Fundy. A very strong 

 indraught, both on the ebb and flood, sets toward the isles, and in the vicinity, equal to 

 4 knots an hour, and they should not he approached without a commanding breeze." The 

 lighthou.se should obviate this. 



Tlie Variation of the Compass is incrcasiny on the Coast of Nova Scotia, &c., at the 

 rate of Ij' to 3' per anuuia. 



15. THE UNITED STATES. 



LAT. N. 



LONG. W. 



AUTHORITIES. 



Maine. 



Eastport 



Passamaquoddy Bay, 



Quoddy Head, Liglitho. 

 Little River Island, Lt.. -ho. 

 Machias Seal Ids., Lt.-ho. 



on East one (British) ... 

 Machias Bay , Libby Island, 



Lighthouse 



Moose a-bec or Moose Peak, 



Mistake Island, Lightho. 

 Petit Manan, Lighthouse 



on South end 



Mount Desert Id., Great 



Head, S.E. end 



Mount Desert Rock, Light 

 Isle au Haut, Light on 



Saddle Back Islet 



Matinicus Rock, Lightho. 

 Penobscot Bay, Owls 



Head, Lighthouse 



Cape Rosier 



Maaheigan Island, Lt.-ho. 



The Triangulation made 

 for the United States Coast 

 Survey, under the superin- 

 tendence of Professor A. D. 

 Bache, &c. 



%• For the purposes of the 

 Survey, the Coast of the United 

 States was divided into eleven 

 sections (nine of which are on 

 the Atlantic Coast), in all of 

 which the work was carried on 

 simultaneously, the Survey 

 being in different stages of 

 progress in the several sections. 

 These several sections are de- 

 fined as follows : — Section I., 

 from Passamaquoddy Bay to 

 Point Judith, Section II., from 

 Point Juilith to Cape Henlopen. 

 Section III., from Cape Ken- 

 looen to Cape Henry. Section 

 IV., from Cape Henry to Cnna 



