ATLANTIC ESTUARINE 1IDES 



St John River Tides 



407 



o 







20 



h. m 

 5 40 



I 



II 



III 



IV 



V 



VI 



VII 



19 



111 



8 



8 



10 



10 



10 



15 



11.5 



10.3 



9.7 



8.6 



7.7 



6.2 



h. VI. 



h. m. 



h. m. 



h. m. 



/i. m. 



h. m. 



h. m. 



5 1H 



5 16 



5 16 



5 17 



5 17 



5 18 



4 48 



7 



7 9 



7 9 



7 8 



7 8 



7 7 



7 37 



H. W. interval from Indiantown. 

 H. W. advance in last hour (miles). 

 Mean tide range (inches). 



Duration of rise. 

 Duration of fall. 



At Fredericton, over 70 nautical miles from Indiantown, the 

 mean levels are 14 feet 4 inches above mean sea-level. The rail- 

 road levelings are used in this determination and may be open 

 to some doubt ; but Young asserts that tide runs 100 feet above 

 sea in the Amazon,* and Airy t says the same thing happens in 

 the Firth of Clyde, and, moreover, should happen from theory. 

 As the wave progresses upstream 10 miles an hour, it is not to be 

 supposed that the water poured inward from the Bay of Fundy 

 travels upstream to cause the rise of water. The water is merely 

 set oscillating. The Indiantown tides are themselves two hours 

 later than the tides at St John, and the five-inch wave that 

 reaches Springhill, 78 nautical miles upstream, spends over nine 

 hours in the transit. Salt water is said to be detected 48 miles 

 up the river, which is surprising. 



PENOBSCOT TIDES 



Penobscot bay has its outer waters so full of islands that the 

 tidal bay must be counted to have its mouth from Camden to 

 Castine. Thence to Bangor the ranges mount up steadily — 9.7, 

 9.8, 10.2, 10.6, 12.0, 13.1 feet in 26 miles. The times indicate a 

 clear retardation, though the series is short. Tide passes from 

 Matinicus, the outer island, to Bangor in two hours. Above 

 Bangor the river part is cut off by falls, and no river part is 

 present. Only depth of water and freedom from sediment can 

 allow such tides in a narrow channel. 



KENNEBEC TIDES 



The tide progresses from the sea to Augusta (45 miles) in four 

 hours, with somewhat irregular speed and diminishing range. 



* General Astronomy, p. 258. 

 fEncycl. Metropolitana, vol. iii, p. 338. 



