4 STANDARDS FOB INDIVIDUAL EGGS 
TERMS DESCRIPTIVE OF AIR CELL 
(6) Depth of air cell. — The depth of the air cell when 
in its natural position is the distance from the end of the 
egg to the plane passing through the egg at the lower 
edge of the air cell where the cell touches the shell. 
(7) Regular. — A regular air cell is one which shows a 
practically even, smooth outline (without any move- 
ment) when the egg is twirled. 
(8) Slightly tremulous. — A slightly tremulous air cell 
is one which retains a practically fixed position in the 
egg but shows a slight movement, not to exceed one- 
eighth inch, at any one point where its lower edge 
touches the shell. 
(9) Movement not in excess of one-half inch. — An air 
cell which shows a movement, at one or more points 
where its lower edge touches the shell, but not in excess 
of one-half inch. 
(10) Movement in excess of one-half inch. — An air cell 
which shows a movement, at one or more points where 
its lower edge touches the shell, which may be in excess 
of one-half inch. 
(11) Bubbly. — A bubbly air cell is one which has 
several rather small bubbles within or beneath it which 
give it a bubbly appearance. 
(12) Free. — A free air cell is one which moves freely 
about in the egg. Such an air cell v/ill seek the upper- 
most point in the egg, no matter in what position the 
egg may be turned. 
TERMS DESCRIPTIVE OF YOLK 
(13) Well centered. — ^A yolk that occupies the center 
of the egg without much movement from that position 
when the egg is twirled. 
(14) Fairly well centered. — A yolk that occupies the 
center of the egg but which may show a moderate move- 
ment from that position w^hen the egg is twirled. 
(15) Plainly visible. — A plainly visible yolk or yolk 
shadow is one which has a plainly discernible outline 
before the candle and may appear as a dark shadow. 
(16) Dark shadow. — A dark yolk shadow results 
when a freely mobile yolk closely approaches the shell, 
when twirled before the candle, and is distinctly dis- 
cernible as a dark shadow. 
(17) Outline indistinct. — A yolk or yolk shadow, the 
outline of which is not clearly discernible when viewed 
before the candle. 
