Elementary principles of agriculture; a text book for the common schools . elementaryprinci00ferg Year: 1908 Farm Poultry 225 cinders, etc., are desirable forms of grit. Crushed oyster- shells, or bones, supply the material for making the bones in young growing chickens and the egg-shells for laying hens. 312. Improving Poultry. To improve a breed or flock of poultry, use the eggs from the individuals hav- ing the desired characters. In breeding for increased egg-production, the number of eggs laid by a hen in a year is of far more importance than the color of the feathers. A hen lay- ing 200
Elementary principles of agriculture; a text book for the common schools . elementaryprinci00ferg Year: 1908 Farm Poultry 225 cinders, etc., are desirable forms of grit. Crushed oyster- shells, or bones, supply the material for making the bones in young growing chickens and the egg-shells for laying hens. 312. Improving Poultry. To improve a breed or flock of poultry, use the eggs from the individuals hav- ing the desired characters. In breeding for increased egg-production, the number of eggs laid by a hen in a year is of far more importance than the color of the feathers. A hen lay- ing 200 or more eggs a year is worth many times more than one laying from 30 to 50. There are many poor layers in all flocks. By using trap-nests for a full-year test the Maine Experiment Station found that in a number of spring pullets all bred pure to type, only 3 laid more than 200 eggs; 10 laid 175 to 200; 11 laid 150 to 174, and so on down; 11 laid 75 to 100; 6 laid 50 to 75, and 5 laid 36 to 49. 313. Preserving Eggs. Eggs decay as the result of the growth of germs in the rich substances of the egg. Warm temperatures favor the rapid development of the germs, hence eggs decay much faster in the summer. Just how the germ makes its entrance through the shell is not fully understood. Of the many kinds of egg-pre- servatives, none are so satisfactory as sodium silicate, commonly called ''water-glass.' The eggs may be packed away in a solution of about one part of water-glass to twelve parts of clean boiled water and kept as long Fig. 151. A home-made trap nest.
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