Show shell materials the average lien hen eats three cents worth of oyster shell a year and when it Is available she will lay about 80 30 more eggs a year than though it Is not provided the hen heeds calcium carbonate for the egg shells shell it Is difficult for her to secure an am ample supply of ahli ahls from water an and feeds alone Poultry meA ang ago teamed learned that oyster shell was about 09 00 per cent pure calcium carbonate and whoa when crushed wis was readily available for ali the hena 1 t 11 |