^EQUIPMENT OF AN EGG-BREAKING PLANT. ',) 
to nest much time and space in the handling will be saved. The 
eggs are placed by the candlers in the holes, with the leaking end 
at the top. 1 
Fig. 7. — A nesting tray for leaking eggs (capacity, 3 dozen eggs). 
Specifications. — The tray, which is usually made to hold three dozen 
eggs, consists of a pan and a perforated plate for holding the eggs. 
The pan is made of galvanized iron 0.0159 inch thick, and is 12£ inches 
square and 3^ inches high, with the rim rolled on wire 0.1144 inch in 
diameter. The plate for holding the eggs, made of galvanized iron 
0.0201 inch thick, 2 has 36 perforations, If inches in diameter, with 
centers 2 inches apart and f inch from the edge. The plate is sup- 
ported upon triangular posts of metal or solder l\ inches high and 
1^ inches on the face of the sides and the top. A flange \ inch in 
width is soldered to the bottom, so that it fits over the top of another 
tray for nesting. 
GLASS GRADING CUP. 
(Fig. 8.) 
Glass cups should always be used for the grading of eggs as they 
are broken from the shell. Certain kinds of bad eggs, such as eggs 
with green whites, frequently escape detection when opened into 
nontransparent cups. The cup should have heavy walls and be 
made of smooth, clear white glass, which will stand repeated steriliza- 
tion with steam, and should hold about one-half a gill. A cup of 
this size will hold two eggs conveniently. More than two eggs should 
not be broken into the first container for grading. Some plants 
break only one egg to the cup before emptying, so that- all loss of 
good eggs from contamination with bad eggs is avoided. A plain 
1 The details of the handling and grading of leaking 
to 12, inclusive. 
■ Equivalent to No. 24 Brown & Sharpe gauge. 
44293°--] 8— Bull. 663 2 
are discussed in U. S. Dept. Agr. Bui. 224, pp. 
