Mayhew 1953 Mallard E 66 Experiments April 14 Egg No. R.H. Water Condition Remarks 42 40 1 almost ready to pip 46 65 1 died during last week 50 75 0 ~ 1/2 grown 52 75 1 pipped wrong end, & too soon 54 75 1 ~ 3/4 grown 59 85 1 died during last week 61 85 2 quite small April 21 Today all unhatched eggs from the March 23 setting were broken and examined. The results: Egg No. R.H. Water Condition Remarks 62 85 1 nearly ready to pip 63 85 1 pipped too soon 64 85 2 pipped too soon 65 85 2 pipped too soon 66 75 1 pipped too soon 67 75 1 pipped too soon 68 75 0 nearly ready to pip 69 75 0 nearly ready to pip 70 75 0 pipped too soon 74 65 1 nearly ready to pip 77 40 1 nearly ready to pip 79 40 2 nearly ready to pip April 28 Today all unhatched eggs from the March 31 setting were broken & examined. The results were: Egg No. R.H. Water Condition Remarks 81 40 1 nearly ready to pip 82 40 1 nearly ready to pip 83 40 1 nearly ready to pip 92 65 1 nearly ready to pip 93 65 1 pipped too soon