Mayhew 1952 Mallard E33 Experimental May 3 (those set April 12th) and all farmer eggs set April 19th were dipped once. May 4 Today one more farmer egg set April 8th hatched at 75% relative humidity. It had not been dipped. May 5 Another undipped farmer egg that was set April 8th hatched at 75%. May 7 Today I set 20 eggs from Victor Morijohn's mallards. 10 were placed at 75% relative humidity + 10 at 85%. These eggs came from 3 hens that were bred by 2 drakes. These eggs had been stored in a refrigerator in the day time + outside at night. May 8 Today 18 more farmer eggs were set - 6 at 90%, 6 at 75%, 6 at 40%. May 9 Today Gibson's eggs started to hatch (those that were dipped May 3rd). One hatched at 40% relative humidity first, then 3 hatched at 65% on the same day. May 10 Today 4 more hatched at 65% + 6 hatched at 75%. May 11 Today 1 hatched at 75% and 2 hatched at 85%. There is one pipped egg at 90% also, in addition to pipped eggs in the other humidities. 4 farmer eggs set at May 12 Victor Morijohn's records show that his 4 hens (3 since 1st of month) have laid 162 eggs from Feb. 22 to May 7.