. Annual report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution . the lowerend of the 7mile run the ledges and reefs are too numerous to this place to the mouth of the Larch river the Koksoak is ob-structed by islands, bars, and shoals. Below these, however, itbecomes quite broad, until nearly opposite the high point or promontorybelow the month of the Larch (PI. xxxvi). From this locality it is mo-notonous till the last bend is reached, some 4 miles above Fort Chimo,where it suddenly turns to the north and pursues that direction to thesea with little vari
. Annual report of the Bureau of Ethnology to the Secretary of the Smithsonian Institution . the lowerend of the 7mile run the ledges and reefs are too numerous to this place to the mouth of the Larch river the Koksoak is ob-structed by islands, bars, and shoals. Below these, however, itbecomes quite broad, until nearly opposite the high point or promontorybelow the month of the Larch (PI. xxxvi). From this locality it is mo-notonous till the last bend is reached, some 4 miles above Fort Chimo,where it suddenly turns to the north and pursues that direction to thesea with little variation. At the last bend, however, a large island,locally known as Big island, not only obstructs but ends navigationfor boats drawing over 6 feet. Small boats, such as skiffs and nativeboats, ascend to the lower end of 7-mile run. The principal obstruc-tion to travel in any kind of vessel in the Koksoak from Big islandto the mouth of the Larch river is the presence of two falls or rapidsaV)out 40 miles from Fort Chimo. The extreme rise and fall of the tide at the mouth of the river is 62. TiRNKK.] AROUND FOET CHIMO. 171 feet 3 inches. The usual rise and fall is from 8 to 12 feet less, depeud-iug on the stage of the river. At Fort Cliimo the tide rises as muchas 31 feet. The backwater is held in check as far as the upper rapidsin a common stage of water, and during a high rise in the month ofJune the water is backed some 3 miles beyond the upper rapids. The branches of the Koksoak river are few and unimportant. Thelarger tributary is the Larch river. It is a rapid and almost uunavi-gable stream of variable depth, mostly shallow, and 100 to nearly 400yards wide. At about 40 miles from its mouth the Larch forks, the lower orsouthwest fork draining the eastern sides of the same mountains whosewestern slopes are drained by the Little Whale river. This southwestfork of the Larch river is quite small and scarely capable of beingascended, although it may, with great caution, be descend
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