Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Mallard E 67
Mayhew
1953
Experimental
April 28 Egg No. R.H. Water Condition Remarks
96 75 0 soon ready to pip
98 75 0 small embryo
100 75 1 soon ready to pip
101 75 1 pipped too soon
105 85 1 pipped too soon
106 85 1 soon ready to pip
107 85 1 pipped (too soon?)
108 85 2 soon ready to pip
110 85 2 pipped too soon
May 5 Today all unhatched eggs from the April
7 setting were broken & examined. The results are:
Egg No. R.H. Water Condition Remarks
114 85 2 soon ready to pip.
115 85 2 pipped, yolk almost all gone.
116 85 2 pipped, yolk almost all gone.
121 75 2 died during last week.
122 75 2 pipped, yolk almost all gone.
124 65 1 died during last week.
130 40 1 died during last week.
131 40 1 died during last week.
133 40 2 soon ready to pip.
May 11 The thermostat has been acting up since
last Friday (May 8). It hasn't been
shutting off when it was supposed to,
with the result that the temperature in
the first box (#1) at 40% relative humidity
rose to 41°C. Therefore, all the eggs from
April 14 & May 5 at that humidity
are probably dead. The temperature rose