GEOGEAPHICAL POSITIONS. 



63 



•upon a longitude of 71° 16' W. for Quebec. This was shown to be in error nearly 3^ 

 minutes of are, by electric telegraph signals transmitted between Quebec and Cambridge 

 Observatory, in Massachusetts, by Lieutenant E. D. Ashe, R.N., in 1857. 



The position of Cambridge, as will be seen in the Note on that longitude on a subse- 

 quent page, was settled as 71° 7' 58"55", and the mean difference between that Observa- 

 tory and the Observatory in Mann's Bastion in the Citadel of Quebec, as determined by 

 Lieutenant Ashe, is 0° 4' 84-17", which placed Quebec in 71° 12' 32-72". By the most 

 recent observations, Quebec Observatory is placed in long. 71° 12' -20", as giveia in the 

 Table. 



3. Montreal. — The longitude of Gate Island, opposite the Cathedral and the Hotel 

 Dieu, is given by Captain Bayfield in 73° 34' 38". Lieutenant Ashe, R.N., as stated 

 above, in continuation of his work on electric time-signals, obtained the difference of 

 longitude between Quebec and Viger Square, 630 ft. West of Gate Island, on March 12th, 

 1857, as 2° 20' 45-5", which makes it in longitude 73° 33' 18-12". as shown in the Table. 



4. Charlottetown and Prince Edward's Island. — The position of the flagstaff in 

 the Fort of Charlottetown was given by Eear-Admiral Bayfield as lat. 46° 15' 55" N., 

 long. 63° 7' 23" W. It had been before placed 3' more to the West, but the exact 

 difference of longitude between this point and Quebec has been determined by the 

 electric telegraph as 8° 5' 26". 



The Variation of the Compass is now decreasing on the shores of the Gulf and ilivei 

 of St. Lawrence, at the rate of 1' per annum. 



14. NOVA SCOTIA, &c.— (Southern Coasts.) 



LAT. N. 



AUTHORITIES. 



SABLE ISLAND [1] 

 Lighthouse l^- mile from 

 East end 



Lighthouse on West end 



NOVA SCOTIA. [2] 



Cranberry Island, Lightho 



Canso Harbour, Cutler Id. 



S.E. extreme 



Steeple of Church 



White Head Island, Lt.-ho 

 White Haven, Observation 



Station in Marshall Cove 

 Berry Head, Lighthouse... 

 New Harbour Head, Nob 

 Green Island, Lighthouse 



on South point 



Harbour Island, N.E. point 

 Isaac Harbour, Eed Head, 



summit 



Country Harbour, Station 



opposite Widow Point... 

 HoUins Head 



The Surveys by Admiral 

 H. W. Bayfield; and Com- 

 manders Shortland & Orlebar, 

 E.N., 1827-60, &c. 



