EXAMINATION OF FROZEN EGG PRODUCTS. 4 



of each class of eggs considered inedible, in so far as they were obtain- 

 able. Records of the eggs used in making these samples were kept. 

 The preparation of each type of sample was repeated in as many 

 different factories, using different raw material, as many times as 



possible. 



PRELIMINARY INVESTIGATION. 



In order that all the analysts might have a good working knowledge 

 of the methods of examination before assembling for the analysis of 

 the frozen samples, and to obtain data on fresh eggs of high quality 

 and on storage eggs, they were requested to carry out the following 

 procedure in their home laboratories during the early summer: 



1. On five different days, each laboratory shall obtain a representative sample of 

 absolutely fresh eggs. These shall be opened aseptically according to the method 

 described, the yolks and whites shall be thoroughly mixed together under aseptic 

 conditions, and the mixture shall be subjected to bacteriological, chemical, physical, 

 and microscopical examination. 



2. On five different days, each laboratory shall obtain a representative sample of 

 absolutely fresh eggs. These shall be opened aseptically according to the method 

 described, and the yolks and whites separated. The thoroughly mixed yolks and 

 the thoroughly mixed whites shall each be subjected to bacteriological, chemical y 

 physical, and microscopical examination. 



3. On five different days, each laboratory shall obtain a representative sample of 

 eggs which have been in cold storage, but which are still considered edible, and shall 

 proceed as under No. 1. 



4. On five different days, each laboratory shall obtain a representative sample of 

 eggs which have been in cold storage, but which are still considered edible, and shall 

 proceed as under Tso. 2. 



RESULTS OF PRELIMINARY INVESTIGATION. 



The results of this part of the investigation are given in Tables 

 1 to 7, which also include data obtained by one of the laboratories in 

 the examination of some May eggs transported from Tennessee and 

 Ohio to the Atlantic seaboard, and there opened under commercial 

 conditions. 



