MACKENZIE DELTA KAYAK, in Museum of the American Indian, Heye Foundation.] The design is marked by a very narrow flat bottom or a wide keel combined with the ~V~-bottom. These boats are well-built and are light and graceful. The wide keel is formed by a thick plank keelson which narrows at bow and stern and is bent up to form the stem and stern. The chine pieces run fore and aft and are lashed to the stem and stern thus formed. The gunwales are about ¾ by 1⅛ inches. The frames are about ¼ by ⅝ inch bent in a strongly ~U~-shaped form, with their ends tenoned into the bottom of the gunwales. The keelson is only about ⅜ inch thick and the chines are rather wide thin battens; about ⁵⁄₁₆ by 1¼ inch. Some kayaks have an additional batten in the sides above the chines. The deck is slightly ridged for nearly the length of the boat. The stem and stern are carried up above the sheer to form prominent posts; some builders carry them higher than shown. The construction is neat and light and the boat is very easily paddled. Its narrow beam makes it somewhat treacherous, however, in unskilled hands. A double-bladed paddle is generally used with this kayak. While the form appears to vary little among individuals of this class, the construction varies, particularly in the number and dimensions of the longitudinals. Frames are spaced rather consistently 5 to 6 inches apart. [Illustration: Figure 189 KAYAK FROM POINT BARROW, Alaska, in U.S. National Museum (USNM 57773). Collected by Capt. M. A. Healy, U.S. Revenue Steamer _Bear_, 1888. (_Smithsonian photo_ MNH-399-A.)] [Illustration: Figure 190 COCKPIT OF KAYAK from Point Barrow (USNM 57773), showing method of lashing skin cover to manhole. (_Smithsonian photo_ MNH-399.)] [Illustration: Figure 191 KAYAK IN U.S. NATIONAL MUSEUM (USNM 160325) cataloged as from Mackenzie River area, 1885, but apparently an eastern kayak of unidentified origin.] [Illustration: Figure 192 CORONATION GULF KAYAK, Canada, partially reconstructed from a damaged privately owned kayak (now destroyed).] [Illustration: Figure 193 CARIBOU ESKIMO KAYAK, Canada, in American Museum of Natural History.] [Illustration: Figure 194 NETSILIK ESKIMO KAYAK, King William Island, Canada, in the American Museum of Natural History.]