Mayhew 1953 Mallard E 69 May 19 Egg No. R.H. Water Condition Remarks 169 75 0 died during last week 172 75 1 died during last week 177 75 2 died during last week 180 65 1 died during last week 183 65 2 blood ring when candled. 184 40 1 died during last week 185 40 1 ~ 3/4 grown; large air cell 186 40 1 ~ 3/4 grown; large air cell 187 40 2 ~ 3/4 grown; large air cell 188 40 2 ~ 3/4 grown; large air cell 189 40 2 ~ 3/4 grown; large air cell all the eggs at 40% died at about the same stage of development, so apparently they were also effected by the extreme temperature ten days ago. Therefore, these eggs will not be counted in the results. All other humidities produced hatches comparable to previous weeks, so these eggs did not receive a lethal dose apparently. Therefore, only the eggs at 40% relative humidity will be discarded from the record. May 26 Today all unhatched eggs of the April 28 setting were broken and examined. The results: Egg No. R.H. Water Condition Remarks 190 40 1 died during last week 191 40 1 died during last week 192 40 1 very small embryo 193 40 2 ~ 3/4 grown