THE CALL OF THE HEN. 



Ill 



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. 



FIG. 162 SPAN BETWEEN PELVIC BONE AND KEEL ILLUSTRATED IN 



DRESSED FOWtS 



The bird on the left in this illustration is a high-producing R. I. Red hen, and the 

 one on the right a low producing hen. Note the greater distance between keel and 

 pelvic bone, also the much rounder breast of the heavy layer, caused not by fat but by 

 the more prominent sternal processes. Photo from Storrs Experiment Station. Note 

 the large moist vent in the good layer, on the left. Also the skin of the good layer is 

 soft and pliable. The poor layer on the right is the reverse. 



