morning?"

"I think I did notice it," Percy replied, "but it is so easy for the
farmer himself to tell a sandy soil from a clay soil that I did not
appreciate the value of those physical analyses.

"In any case, I shall be very glad to know what results were
obtained from the chemical analysis of the soil separates to which
you referred."

"Those results are all reported in Bulletin No. 54 of the Bureau of
Soils," said the Chemist, "and I have extra copies right here and
will be glad to present you with one. And let me give you our
Bulletin 22 also. This will enable you to get a clear idea of the
principles we are developing which are solving the soil fertility
problems that have completely baffled the scientists heretofore."






CHAPTER XXIII

MATHEMATICS APPLIED TO AGRICULTURE