THE CALL OF THE HEN. 99 
CHAPTER XX. 
WALTER HoGan’s SYSTEM. 
This chapter contains ‘Walter Hogan’s System,’”’ as written by 
M. F. Greeley, editor of the Dakota Farmer, to whom I gave the notes. 
This was published in 1904. At that time Mr. Greeley refused to put 
in anything about the skull theory. He said that I would make myself 
the laughing-stock of the world. I am merely putting this old work in 
this book in order that the reader may know the evolution of the dis- 
covery. The pelvic bone method of selection was, of course, my first 
discovery; then later, the relation between depth of abdomen and thick- 
ness of pelvic bones; after that, the working out of the mathematical 
relation between egg-laying ability and those points before mentioned. 
When I came to California I gave out merely the ‘‘Walter Hogan’s 
System” which had been printed in Minnesota; later I published a 
“Supplement,” which gave a general idea of the capacity and type 
proposition; still later I issued typewritten charts as they are found in 
this book. I could have done all this many years ago, but my reasons 
for not doing it are explained elsewhere. 
I do not desire any of my readers to make the mistake of considering 
what comes after this as having anything to do with ‘The Call of the 
Hen,”’ except in a historical way. WALTER HoGan. 
Petaluma, Cal., July 31, 1913. 
