80 BULLETIN OF THE NATURAL HISTORY SOCIETY. 



nie) a matter of consideraljle importance especially as regards 

 setting nets for fishing, getting grounded vessels afloat and other 

 such practical purposes. Hence, although my motive in this 

 enquiry has been purely scientific interest, I have thought it 

 worth while to give in Table VI the interval between high water 

 in St. John harbor and high water at seventeen points of impor- 

 tance on the river. This table, together with a McMillan's 

 Almanac, will enable a resident on the river to anticipate high 

 water quite as accurately as a resident in St .John can at the 

 present time ; for the figures in Table VI cannot be more than 

 ten or twelve minutes in error, probably much less, and this is a 

 smaller amount than the error incident to the prediction of 

 high water in St. John harbor at present. It may be well to 

 repeat that this table applies to either spring or neap tides during 

 low summer level. It remains to be seen whether it will apply 

 to the river when full, in the spring or early summei-. I think 

 it can be safely predicted that the difference will not be great ; 

 for, while the gr-eater speed of the water will naturally retard 

 the progress of high water, the greater depth of the river will 

 cause a wave, whether up or down, to travel with greater speed ; 

 and the two effects, depending on the same cause, will tend to 

 neutralize one another. This, however, is a point that should 

 be settled by observations in springtime. 



XII. Effect of Narrow Outlet of River. 



Tlui most important tidal effect due to the remarkably 

 narrow outlet of the river is the great delay of high water at 

 Indiantown — two hours very closely, — although Tndiantown is 

 onlj' a mile from the harbour. As the water rises in the harbour 

 it must attain the level in the river above the rapids before 

 much rise can occur at Indiantown. After that, as the supply 

 of water from the harbor and bay is unlimited, whih; the large 

 basins above Indiantown have a great capacity, the narrow 

 outlet under the bridge is totally inadequate to keeping the 

 levels above and below ecjual, so that for two hours after the 

 water has reached its maximum level at St. John, and lias 



