Show value of limestone and oyster shell for hens according to maryland bulletin a crushing test of eggs laid by oyster shell fed and limestone fed hens hena showed no appreciable difference in the strength of shell there was practically no dir difference ference in the thic thickness kness ot of shell of production in the me limestone pen the consumption of limestone per bird was wag much less titan than the consumption of oyster shell even though there was a greater egg production in the tha limestone pen tills test would indicate that limestone con le ile safely used as the sole source of supply of material for eggshell making wilb laying liens hens |