PREFACE TO VOLUME SECOND.

In this volume an attempt has been made to treat the subject of

fertilizers and fertilizing materials in the manner followed in

the first volume with soils. The general principles of fertilizer

manufacture and application have been presented in so far as they

seemed to throw light on the rational method of examination and

analysis. The standard methods of analysis in use in this and other

countries, have been presented with sufficient fullness for the

guidance of the skilled worker, and the information of the student. To

those who make use of a book only for routine work or for preparation

for an examination, this volume, as its predecessor, will be found to

have little attraction. This fact, however, will not be a cause of

regret to the author whose purpose has been, avowedly, to present to

the busy worker and student a broad view of a great subject which each

one does not have the time to search out for himself.

It is a matter of regret, however, that the contents of the volume

have again exceeded all expectations. It was found impracticable to

secure any greater condensation without departing from the purpose,

and impairing the completeness of the work. When work is done with

no prospect of financial compensation, it is gratifying to find it

appreciated, and the author will be content to have this volume meet

with as kindly a reception as has been accorded volume one.

HARVEY W. WILEY.

WASHINGTON, D. C.,

End of July, 1895.

Principles and practice of agricultural analysis. Volume 2 (of 3), Fertilizers · 第 3 / 71 题