PEOCEEDINGS FOE 1894. XI 



Astronomer Royal. Froia these quantities and the coiTesjJonding results obtained by the English 

 obser%'ers the following provisional values of the longitudes of the several stations are derived : — 



H. M. s. 



Montreal (McGill College Observatory transit pier) 4 54 IST 



Canso (Commercial Cable Co.'s office, Hazel Hill 4 04 413 



Waterville (Commercial Cable Co.'s office, Ireland) 40 0P3 



" This value for Montreal is slightly (0'15 sec.) in excess of the value hitherto accepted. 

 " Early last winter the corrected star places were received from Greenwich and from these the 

 clock errors have been entirely recomputed. The final results are now in the hands of the Astronomer 

 Royal, and I hope to be able to announce the new value of the longituile of Montieal during the pre- 

 sent meeting of the Ro3'al Society. 



" I am, Sii-, 



" Yours veiy truly, 



" C. H. McLeod." 



XII. Observation op Tides and Currents. 



It is satisfactory to learn from the report of the Department of Marine for 1893-4, that progress 

 continues to be made with the survey of tides and currents in Canadian waters. This report 

 contains a very full and interesting account (see Appendix A) of all woik done up to January last, 

 by Mr. William Bell Dawson, C.E., who has been appointed to take charge of this important branch 

 of the public service. From this report we make the following extracts as quite .sufficient for our 

 purpose of keeping the members of the Royal Society conversant with the pi'ogress of observations 

 in which they have taken the deepest interest from its very inception : 



" Tide Gauge Stations Established vp to December, 1893. 



"St. John, N.B. — Gauge placed against wharf in harbour. D. L. Hutchinson, meteorological 

 observer, in charge. In operation since December, 1892. 



" Southwest Point, Anticostl — Crib erected for gauge. H. Pope, lighthouse-keeper, in charge. 

 Observations commenced July, 1893. 



" St. Paul Island, C.B. — Gauge on a crib built into an opening between rock cliffs. John Camp- 

 bell, lighthouse-keeper, in charge. Observations commenced September, 1893. 



" Magdalen Islands — At Grindstone, on east side of the islands. Gauge in a well in a timber break- 

 water for better protection. A. Le Bourdais, local superintendent of , telegraphs, in charge. 

 Observations commenced October, 1893. 



" Quebec — Gauge placed at the Levis Dry Dock. U. Valiquet, engineer of Dry Dock, in charge. 

 Observations commenced November, 1893. 



" Father Point — (Unfinished.) Gauge to be placed in a well sunk on shore, and tide to be led to it 

 by a trench and piping. 



" Completion of the Survey. 



" The time required for the survey of the currents on both the Atlantic and Pacific coasts will be 

 about six or eight years, on the basis of an annual expenditure as indicated below, and the average 

 annual cost should be fully covered by the amount of the present estimate; with the exception of the 

 sum allowed for the use of the steamer, which in future years should be available for the whole 

 season. With this proviso, it will be possible in the time stated to survey the currents in the open 

 waters traversed by the ocean-going vessels, and on the main routes leading to our princij^al harbours ; 

 but it does not contemplate an examination in detail of the currents in the less important baj's and 

 straits. The amount of the estimate also includes the additional tide gauges to be established in the 

 first two seasons in advance of the survey of the currents in each region. The margin corresponding 

 to this in later years can be used to carrj^ forward the tidal work^ until the completion of the survey 



