National Geographic : 1898 Sep
ATLANTIC ESTUARINE TIDES Kennebec Tides 0 I II III IV H. W . interval from mouth. 0 11.5 8.5 16 8 H. W. advance in last hour (miles). 8.5 6.9 5.5 5.1 4.3 Mean tide range (feet). h.n. h. m. h. . h..h.m. 62355755353651Durationofrise. 62628632649724Durationoffall. Thames river, Connecticut, seems to have a small but typical bay tide. There are but two observation stations. CONNECTICUT TIDES The Connecticut has its mouth in the sand-bar region of the Middle bay, and itself discharges no small quantity of sediments, that make its exit to the sound an embarrassed one. Tide pro gresses up to Hartford (43 miles) in 4 hours and 48 minutes, with fairly constant speed, the ranges steadily diminishing. Connecticut River Tides 0 I II III IV V H. W. interval from sound. 0 9 9 11.5 7.5 9 H. W. advance in last hour (miles). 3.6 2.7 2.0 1.4 1.0 0 .6 Mean tide range (feet). h.m.h.m.h.m.h.m.h.m.h.m. 61853651845444348Durationofrise. 6764977731742817Durationoffall. The stream is narrow, from a quarter to three-quarters of a mile, and shallow. The local geography affords a rational ex planation for the lack of the "bay." The lower course of the river is cut in rocks so much harder than the upper course that the lower valley was gorge-like before drowning. The departure from the ria type is in the lack of uniformity of rock texture along the river. HUDSON TIDES The Hudson also flows in a narrow gorge in its lower course and has no bay nor bay tide. Nearly as narrow as the Con necticut, but deep, it allows a more rapid transmission of the tide wave. The 141 miles to Albany are traveled in 10 hours and 8 minutes.