PREFACE 
m 
years of unremitting labor. Vastly different from the ordinary 
lines of commercial color work, the correct copying of each one of 
the 1115 colors of the original plates developed many perplexing 
and often discouraging problems, which were finally solved through 
Mr. A. B. Horn’s expert knowledge of chemistry and pigments; 
the skill, industry, and patience of the firm’s head colorist, Mr. 
Frank Portugal, and the personal interest of both these gentle¬ 
men. It is, therefore, with the greatest pleasure that the author’s 
grateful acknowledgment is made to the firm of A. Hoen & 
Company for the satisfactory manner in which they have fulfilled 
their contract. 
