Fig. 2
Two complete No. 2 molds are required, but it is more convenient to make each mold in two sections. Each half is made 11¹⁄₂ in. wide and 12 in. deep, as shown in [Fig. 3]. First draw a rectangle to these dimensions and run cross lines to divide it into quarters. Beginning at the upper right-hand corner, mark the mortises for gunwales and backbone, which, being only one-half of the complete form, will be ⁷⁄₁₆ in. wide and 3¹⁄₄ in. deep. Laying the rule on the outside line immediately below the mortise, draw a second mortise for the keel, which is ³⁄₈ in. deep and 1¹⁄₂ in. wide in the half section. Measure off 1³⁄₄ in. to the left along the bottom line from keel mortise and make dot 1. The dot 2 is made by measuring 2¹⁄₂ in. to the left of 1, turning the rule at right angles at B and measuring ⁵⁄₁₆ in. inside the line as shown in the sketch. Make the dot 3 at a point 1³⁄₄ in. to the left of 2 and ³⁄₄ in. inside of the line. The dot 4 is 1³⁄₄ in. from C and 1³⁄₄ in. inside of the line. The dot 5 is 1¹⁄₄ in. farther to the left and 3¹⁄₄ in. inside of the line. The dot 6 is ⁵⁄₈ in. from dot 5 and 4³⁄₄ in. inside of the line, which will bring it ³⁄₈ in. inside of the left vertical line. At a point 1¹⁄₂ in. above 6 make dot 7 on the marginal line, and dot 8, 1¹⁄₄ in. above it. Between the dots 7 and 8 is the widest part of the bilge curve. Dot 9 in exactly ¹⁄₄ in. inside of the vertical marginal line. These dots produce the angles, and it is only necessary to trace in the full curve and cut it out to make a pattern for the other three half sections needed.
Fig. 3
It Is More Convenient to Make Each Mold in Two Sections, as Two Complete Molds are Required
The molds No. 3, [Fig. 4], are located near the center of the canoe and are made a trifle wider. Make a rectangle 14³⁄₈ in. long by 12 in. wide and draw cross line dividing it into quarters. Trace the half mortises for the backbone, gunwale, and keel from the No. 2 mold pattern. Lay the rule on the bottom line and measure off ¹⁄₂ in. to the left from the center vertical line and mark dot 1, which is the beginning of the bilge curve. At a point 2³⁄₄ in. to the left and ³⁄₄ in. inside of the line place dot 2, and 2 in. to the left of this and 2¹⁄₄ in. inside of the line place dot 3, then 1¹⁄₈ in. farther to the left turn the rule at right angles and measure up 4 in. inside of the line for dot 4, which is ¹³⁄₁₆ in. inside of the left marginal line. At a point 2 in. above dot 4 make dot 5 on the marginal line and 2¹⁄₈ in. above it make dot 6. The space between gives the widest part of the bilge curve, with dot 7 exactly ¹⁄₄ in. inside of the marginal line, measuring along the bottom of the gunwale mortise. Trace the angle and from it run the full curve and use this for a pattern for cutting out the other molds.
Fig. 4
This Mold is Located near the Centre of a Canoe and is Made a Trifle Wider
Mold No. 4 is placed amidships in the center of the canoe and only one complete mold is required, as shown in [Fig. 5]. To make a pattern draw a rectangle 15 in. long and 12 in. wide, and divide it into four equal parts as before. From the No. 3 mold pattern trace in the mortises for the gunwale, backbone, and keel. Lay the rule on the bottom outside line and measure 2 in. from the center line to the left at D and turn the rule at right angles and measure off ⁵⁄₁₆ in. inside of the bottom line and make dot 1. Measure, from D, 1¹⁄₂ in. to E, turn the rule up and measure off ⁵⁄₈ in. inside the line and make dot 2. The dot 3 is 1¹⁄₂ in. farther to the left and 1¹⁄₄ in. inside the line and dot 4 is 1 in. to the left of 3 and 2 in. inside of the line. The dot 5 is 1¹⁄₄ in. to the left of dot 4, and 4 in. inside of the bottom line, which will bring it ¹⁄₄ in. inside of the left vertical side line. At a point 2 in. above dot 5 make dot 6 on the outside vertical line and 1¹⁄₄ in. above it make dot 7. The space between dots 6 and 7 gives the widest part of the correct bilge curve. Exactly 3³⁄₄ in. above dot 7 and ¹⁄₄ in. inside of the vertical side line make dot 8, which marks the beginning of the bilge curve above the water line and at the gunwale mortise. The curve of the canoe floor is quite flat, but not exactly a straight line. Lay the rule on the bottom line and measure up, on the inner edge of the keel mortise, ¹⁄₈ in., then 2¹⁄₂ in. to the left make a mark, F, ¹⁄₁₆ in. inside the bottom line and a pencil line drawn between them will enable one to trace the correct curve. Having cut out the pattern make two wood forms exactly alike to have it complete, as shown. After finishing the seven complete molds, fasten them securely together by nailing a couple of battens across the halves.
