Mayhew 1952 June 30 Mallard E43 All the remaining eggs were broken open today. The results were as follows: 40% — 4 G(24) eggs were infertile. 1 G(24) - large embryo / yolk 1 G(24) - small embryo 2 M(31) - small embryo 1 M(31) - medium embryo 2 M(31) - large embryo / yolk 65% — 3 G(29) - infertile 2 M(33) - large embryo / yolk 75% — 4 G(24) - infertile 1 G(24) - large embryo / yolk 2 M(23) - very tiny embryo (stuck) 85% — 1 G(24) - infertile 1 M(31) - large embryo / yolk 2 M(31) - pipped too soon 1 F(31) - pipped too soon 90% — 2 M(31) - very small embryo A summary of the incubation data for the year is compiled in the following pages. A total summary is present, as well as a summary of the results from the eggs from the four separate sources. From these summaries, it can be readily seen that under these experimental conditions, dipping the ege in water is necessary to obtain any hatch at all.