The Bark Canoes and Skin Boats of North America

by Tappan Adney; Howard Irving Chapelle

Figure 43

Ribs Being Dried and Shaped for Ojibway Canoe. (Canadian Geological Survey photo.)

The heels of the stem-pieces rest on the bottom bark and the sewing is carried down to where the cutting of the profile makes an end to the seam, the solid part of the heels extending about 6 to 8 inches inboard of this. Next, any sewing required on the bottom is done. When the bark cover has been given a final inspection on the outside and all sewing has been completed, the canoe is lifted from its supports, righted, and set on the bed or on a smooth grassy place.

All seams are now payed with gum on the inside of the bark while this can still be done without interference from the sheathing or those parts of the structure remaining to be installed. The Malecites used only spruce gum tempered with animal fat. The gum, heated until it is sufficiently soft to pour like heavy syrup, is spread with a small wooden paddle or spoon, and is then worked into the seam and smoothed by rubbing with the thumb dipped in water to prevent the gum from sticking and burning. It is first worked into the ends, between the bark and each side of the stem-pieces, particularly near the heel below the waterline. When the crevices are filled, a piece of bark (in later times a piece of cloth was used) wide enough to cover the gum alongside is well smeared with warm gum and pressed down along the inside of the stem-pieces. On each seam, at gores, and on side panels a thin narrow strip of bark is smeared with gum and pressed over the seam after the latter had been well payed. The bark is now carefully scrutinized for small splits, holes, or thin spots since these can be easily patched from the inside at this stage of construction. In fitting bark strips and in gumming, great care is taken to obtain a flat surface; the edges of the strips inside are faired to the inside face of the bark by smearing gum along the edges. The canoe is now ready to be sheathed and ribbed out.

The sheathing for this canoe has been split in advance out of clear white cedar in splints about 5 to 9 feet long, 3 to 4¼ inches wide, and ⅛ inch thick. The butts of each piece have been whittled to a feather edge, the bevel extending back about 2 inches. Also, some pieces of basket ash have been split out of saplings for temporary ribs to hold the sheathing in place.

A total of 50 or more ribs in five lengths, the longest about 5 feet, have been made up from white cedar heartwood and bent to the desired shape.

In deciding the rough lengths of the ribs, the builder can resort to various methods. He can prebend ribs in pairs to a number of arbitrarily chosen shapes: the first set of six pairs to the desired midsection form; a second set of five pairs to the form of the section between the middle and first pair of thwarts; a third, of five pairs, to the section at the first thwarts each way from the middle; a fourth, of four pairs, to the section between the end and the first pair of thwarts each way from the middle; a fifth, of three pairs, to the section at the end thwarts; and a sixth, of two or three pairs, for the section at or near the headboards. This makes from 50 to 52 frames in a canoe measuring 18 or 19 feet overall.

Each frame piece is treated with boiling water and then bent, over the knee or around a tree, to a slightly greater degree than is needed. While thus bent, each pair is wrapped lengthwise over the end with a strip of basswood or cedar bark to hold the ribs in shape. Sometimes a strut is placed under the bark strips to maintain the desired form, or a cross-tie of bark may be employed. The ribs are then allowed to season in this position.

Another method, which will be illustrated later (p. [53]), involves placing ribs of green spruce in their approximate position and forcing them against the bark. In this method, a number of long battens are placed over the roughly bent ribs laid loosely inside the bark cover, and are spread by forcing a series of short crosspieces, or stays, between them athwartships. The bark is given a good wetting with boiling water to make it flexible and elastic, so that the pressure applied to the battens by the temporary crosspieces brings the bark to the shape desired for the canoe. The rough lengths of the ribs are determined by use of a measuring stick or by measurements made around the bark with a piece of flexible root or a batten of basket ash. The ribs, in any case, are made somewhat longer than required to allow a final fitting when being placed over the sheathing.