Sessional Papers 8 to 9, 1892 . your note of the 21st ult., and send you by mail, aupy of our annual report, in which you will find statement of the opening and closing)f navigation from 1877 to 1886, as well as other information that you may find inter-esting. Believe me, yours very truly, (Sgd.) THOMAS HOWARD, Harbour F. Baillairge, Esq.,Ottawa. [1891] 403 8*—26 Victoria. Sessional Papers (No. 8.) A. 1892 APPENDIX No. 21. KT OX WATER LEVELS, RIVER ST. LAWRENCE, BETWEEN QUEBEC, MONTREAL ANDLACHINE, BY R. STECKEL, CIVIL ENGINEER, 24:TII NOVEMBER, 1891. NOTE A. PROXIMATE DETERMINATION
Sessional Papers 8 to 9, 1892 . your note of the 21st ult., and send you by mail, aupy of our annual report, in which you will find statement of the opening and closing)f navigation from 1877 to 1886, as well as other information that you may find inter-esting. Believe me, yours very truly, (Sgd.) THOMAS HOWARD, Harbour F. Baillairge, Esq.,Ottawa. [1891] 403 8*—26 Victoria. Sessional Papers (No. 8.) A. 1892 APPENDIX No. 21. KT OX WATER LEVELS, RIVER ST. LAWRENCE, BETWEEN QUEBEC, MONTREAL ANDLACHINE, BY R. STECKEL, CIVIL ENGINEER, 24:TII NOVEMBER, 1891. NOTE A. PROXIMATE DETERMINATION OF MEAN LEVEL OF ATLANTIC OCEAN, AT QUEBEC, BY MEANS OF DATA AFFORDED BY TIDE AND RIVER GAUGE REGISTERS KEPT AT VARIOUS PLACES BETWEEN QUEBEC AND MONTREAL, 1878 TO 1882 ; THE ADMIRALTY CHARTS, Etc, Etc 8^—26^ 55 Victoria. Sessional Papers (No. 8.) A. wmtii NOTE A. APPROXIMATE DETERMINATION OF POSITION OF MEAN LEVELATLANTIC OCEAN AT QUEBEC, BY MEANS OF DATA AFFORDEDBY TIDE AND RIVER GAUGE REGISTERS KEPT, 1878 TO 1882, 1st. Let A B C D E A be a cross section of LakeSt. Peter, or at any other poiof the River St. Lawrence, where it is free from regular tidal fluctuations, or practicalso, in comparison to the variations of level due to changes in the fresh water dischardand where the elevation of the bottom of the thalweg is near a maximum and the biwould be completely uncovered if the stream ran dry at any time; the surfaces Aand B D corresponding ; respectively, to river levels 26-6 ft. and 20 ft. above 0, pMontreal Harbour Commissioners gauge at Sorel. 2nd. a h c d e a, a, cross section of the St. Lawrence estuary—such as it would be,the Atlantic Ocean ; being abstracted from the combined influences of the sun and moow^as tideless—at a point where the depth of the back water from the sea at its meflevel is great in comparison to the total depth of the stream of drainage and tide makes its way to the gulf; the surfaces a e and b d also corresponding to tlr
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