“Mrs. Yule's chagrin and horror at what she called her son's base ingratitude knew no bounds ; at first it was even thought that she would never get over it. […]”

Thus all the treasure of our flowing years, / Our ebb of life for ever takes away.

It is shown that for pure imaginary eikonals the relative error of O(10) can be achieved.

The data to show this type of effect is entabled for the monovalent group, children and adults, in Tables 7a and 7b.