Mayhew 1952 Experimental June 3 4 MⒺ eggs at 75% were also pipped, as was 1 MⒺ egg at 85%. At noon, 1 of the F⑧ eggs at 40% had hatched. June 4 One more F⑧ egg at 40% hatched this morning. Also 1 F⑧ egg + 2 MⒺ eggs at 75% hatched. 2 F⑧ eggs at 90% contained dead embryos, but the eggs were so rotten they exploded. 4 MⒺ eggs pipped at 85%. One more MⒺ egg hatched at 75% this afternoon. 1 F⑧ + 2 MⒺ eggs are still pipped at 75%. Thus, today 1 hatched at 40%, 4 at 75%. June 5 Of the 9 MⒺ eggs left at 85%, 7 were pipped this morning. Still only 1 F⑧ + 1 MⒺ egg pipped at 75%. All remaining eggs were dipped this morning. 2 MⒺ eggs hatched at 85% today. June 8 Today 2 F⑪ eggs were pipped at 75%. This afternoon 1 of these eggs hatched. June 9 This morning the other F⑪ egg at 75% had hatched. The 11 MⒺ eggs remaining at 65% were dipped today. June 10 Eggs that were overdue for hatching were broken open today. The results were: | 1. F⑧ - pipped too early. | 2. MⒺ - pipped, ready to hatch, but dead. 75% | 3. MⒺ-□-large embryo, lots of yolk left. | 4. MⒺ - " , " | 5. MⒺ - " , " | 6. MⒺ - Mallard E39