This writer seems to differ a good deal from Blith about the advantage of interchanging tillage and pasture.
Two relations R and R' are said to be ordinally similar, if a one-one relation holds between the members of the two fields of R and R', such that if x and y are any two members of the field of R, such that x has the relation R to y, and if x' and y are the correlates in the field of R' of x and y, then in all such cases x has the relation R' to y', and conversely, interchanging the dashes on the letters, i.e.
Thus to divide by a fractional number we must multiply by the number obtained by interchanging the numerator and the denominator, i.e.
Dean slept fitfully, once he managed to count sufficient sheep to do so, with dreams and mind games interchanging so rapidly as to blur the borders more than a map of Africa.
Whenever we have become preoccupied with small detail, we must suddenly change into a large spirit, interchanging large with small.