13G POULTRY PRODUCTION 



strong fowl as is furnished in the egg manufactured in the 

 body of a weak fowl. 



"Furnished with a qualitatively inadequate food-supply, 

 the embryo either dies before hatching or hatches into a weak, 

 debilitated chick. This badly nourished, w^eak chick grows 

 into an adult fowl which is weak in constitution and usually 

 weaker and to a greater degree lacking in vitality than the 



Fig. 68 



Single Comb White Legliorn laying 295 ey:j;3 in first la.\'iii£j: ^'ear. Note 

 body capacity. (Courtesy of D. Tancred, Kent, Wash.) 



parent. This ofl'spring may thus be expected to produce 

 a still less normal supply of nutriment in its eggs tlian did 

 its mother, since it is less vigorous and normal than she 

 was. Thus the weakness is passed on from generation to 

 generation, tending all the time to become greater." 



The Vigorous Type. — There are certain characteristics 

 which arc correlated with that maximum efficiency of all 

 organs termed constitution. These characteristics arc rrla- 



