Table I is made up to give a series of dimensions for practically all weights of bow in 68 inch length, using about a 12 inch center section for handle and dips. The draw pull of these bows is given for yew on the basis of a one million modulus of elasticity and a fibre stress of ten thousand pounds per square inch. These are undoubtedly safe. Some staves will have a higher modulus and will stand a higher stress, but the variation in that respect does not in any way change the dimensions of the cross sections of the limbs. I hesitate to contemplate what an Osage bow of A-40 proportions would draw—probably over 150 lbs., since in good yew it may exceed 100 lbs.

If very good Yew, E may equal 1,200,000 and above weights will be 20 per cent greater. If Osage or Lemonwood, these dimensions result in very much heavier bows, but of correct proportions.