David is, of course, right. by using longer and shorter lengths you mimic tillering and produce a much more efficient bow. i was just being lazy
here it is again properly bundled. i'm using reletively thin branches so it goes 10 at the handle, 8 at the mid point, and 6 at the ends. if yours are thicker you might want 7,5,3 or even 6,4,2 depending on size and material. just about any cordage is suittable for the binding as long as it's TIGHT! for the string, though, you want the strongest cordage available. this one is hand twisted two-ply jute.