Text-fig. 6. 
138 
Miss E. S. Norton on the Weight of 
Each line in the diagram shews how an individual egg decreased in 
weight from day to day. The weight in grammes (shown at the 
sides) determines the height of the line, and the time in days (shown 
at the top) determines the length of the line. Thus, the line of the 
egg 1 commences at the point denoting 59‘8 gr. on the beginning of 
the first day of incubation, and it ends at the point denoting 51 gr. 
on the 22nd day; the egg was opened that day and was found to 
contain a dead chick. X marks the approximate time of the death 
of the chick or embryo. 
Diagram showing the loss of weight in six fowls’ eggs during incubation. 
