EQUIPMENT OK AN EGG-BREAKING PLANT. 



9 



to nest much time and space in the handling will bfc 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 1J inches high and 

 H inches on the face of the sides and the top. A flange J inch in 

 width is soldered to the bottom, so that it fits over the top of another 

 tray for nesting. 



GLASS GRADING COT. 



(frig. 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 eggs are discussed in U. S. Dept. Agr. Bui. 22-4, pp. 

 9 to 12, inclusive. 

 'Equivalent to No. 24 Brown & Sharpe gauge. 



44293°— 18— Bull. 663 2 



