1866.] ‘with the supply of water to Calcutta: 209 
influence of the tides. The change of course is gradual, commencing 
in March and increasing as shewn by Dr. Macnamara’s report. I did 
not make observations until the first of May. 
Tasie IT, 
Chlorine cale.. Saline matter dried 
as Chloride at 220° F. 
To compare Hbb and Flood Tide. of Sodium. ee 
1866 a mile above Baranagar— For 100,000 100,000 Imp. gal. 
grs. ors. 
May Ist, second day of full moon. — “~ = 
Low water nearly complete, ..... ais 28.0 19.60: 
High water nearly complete, Surface, 61.55 43.08 
Deep, 59.55 41.68 
At Caleutta— 
2nd, third day of full moon, 
About ~ Ebb, stream, Surface, 36.20 25.30 
i Opposite Bankshall. Deep, 15.50 
About 2 Flood, stream, Surface, 88.50 62.19 
i Opposite Hatkolah. Deep, 55.50 
At Baranagar— 
16th, third day of new moon, : 
Above 1 or 14 hour Ebb, Surface, 40.00 66.40 46,48 
Deep, 68.60 
Above # Flood, Surface, 78.00 107.20 
Deep, 75.00 109.00 76.30 
Nearly high water complete, Surface, 82.50 104.70 
Deep, 80.00 106.20 
To shew state at Neap tide.. 
24th, fourth day of first quarter of moon. 
Lhour afterbeginning of Ebb,Surface, 17.50 
Deep, 18.50 
3 hours after do. Surface, 12.50 05 
Deep, 1150} 2125 16. 
To shew rate of change during 
Ebb and Plow. 
May 30th, third day of full moon. 
At shore 5h. before tide begun, ... 27.00 
PE PMPLOVS 10, 915 ive esses erssceens os « 2L.50- 
