VI 
PREFACE 
The very apparent need of including a course in the manip¬ 
ulation and applications of the microscope in the curriculum of 
students of chemistry led to the establishment, by the author, 
of laboratory courses in chemical microscopy some fifteen years 
ago. These courses have comprised informal lectures, demonstra¬ 
tions and laboratory practices. The students have been guided 
by their notes and by mimeographed and typewritten sheets. 
With the growth of the courses in number of students, apparatus 
and laboratory equipment, some more permanent and compre¬ 
hensive outline has become imperative. The result has been 
the preparation of the present little book. The author has 
intended it primarily for his students in elementary chemical 
microscopy and as a basis for more advanced work in specific 
fields, but he hopes that the gathering together of methods 
and apparatus may prove of value to American chemists at 
large and perhaps serve to arouse in some an interest in one of 
the most fascinating branches of chemical science. 
The actual nucleus about which the various parts of the book 
have grown is a series of some twenty articles written by the 
author between the years 1899 and 1902 for the Journal of A pplied 
Microscopy, dealing with methods of microchemical analysis; to 
this foundation have been added the laboratory direction sheets 
and the substance of the Lectures delivered. 
Until the year 1911, when Emich’s excellent little Lehrhuch 
der Mikrochemie appeared, there was not in existence any work 
embodying the broad applications of the microscope to the 
solving of problems such as arise in the chemical laboratory. 
So far as the writer is aware this is the only book touching this 
field. The topics presented by Emich are substantially those 
which have been covered in the author’s courses with the excep¬ 
tion that more weight is placed upon analytical methods and 
less upon apparatus. The present writer therefore feels that 
there is still room for an outline of Chemical Microscopy proper. 
It is assumed that the students for whom this textbook is 
intended have had a course in crystallography and one in physics, 
including optics. Therefore, only a mere statement of funda¬ 
mental facts has been thought essential, that is, only so much 
