IV 
PREFACE 
found to lead to better results if the student is obliged to dis¬ 
cover for himself, under guidance, the characteristic morphol¬ 
ogy of the materials studied and having found typical crystals, 
fibers, etc., to sketch them in his note-book. (2) The cost of 
the book to the student would have been very greatly increased. 
This explanation is not offered as an apology for the short¬ 
comings of this book, which the author appreciates are many, 
but is given as. an expression of his opinion that better work 
can be obtained from students providing there is adequate 
assistance given in the laboratory. 
In order to meet the often expressed needs of advanced stu¬ 
dents and of professional chemists, a Handbook of Microscopic 
Qualitative Analysis is in preparation which will be copiously 
illustrated by photo-micrographs and which will thus serve to 
supplement the present introductory text. 
In answer to repeated requests, a brief synopsis of the course 
in Introductory Chemical Microscopy as now given in the 
Department of Chemistry, Cornell University, has been inserted 
in the Appendix. 
The author is indebted to Professor S. H. Gage and to Mr. 
C. W. Mason for many helpful suggestions in the preparation 
of this second edition. 
E. M. C. 
Ithaca, N. Y., Jan. 25, 1921. 
