Mayhew 1953 Experimental June 18 Mallard E 71 Today all unhatched eggs of the May 19th setting were broken. The results were: Egg No. P.H. Water Condition Remarks 259 85 1 died early in 2nd week 260 85 1 died during last week 263 85 2 pipped too soon 266 75 1 very small embryo (cracked) 268 75 2 pipped too soon 273 65 1 died just before pipping 275 65 2 very small embryo 277 40 1 died during 3rd week 280 40 1 (cracked) died during 3rd week 283 40 2 pipped too soon