126 PRACTICAL POULTRY PRODUCTION 



2. There is hardly a demonstration that can be more effectively 

 carried out or that creates more interest than that of preserving eggs 

 by the water glass method. In carrying on the demonstration the 

 method should be explained as discussed herein and the actual opera- 

 tion take place, following the five steps as outlined. An interesting 

 additional feature for such a demonstration is that of showing how an 

 old egg in which considerable evaporation has taken place can not be 

 preserved. In order to prove this point, fill a quart fruit jar about 

 three fourths full of the water glass solution. Place in this solution 

 an egg that has quite a large air cell. It will be noted that the egg 

 will settle to the bottom of the jar and then slowly rise to the top and 

 float on the surface. This action can be easily observed and is most 

 effective in showing- that an old egg can not be preserved. 



3. Should you or your club desire to encourage the home preser- 

 vation of eggs, you no doubt can obtain considerable co-operation 

 from the local druggists or grocers, who, having sodium silicate for sale, 

 will gladly arrange for a window display showing the method of pre- 

 serving eggs. 



REFERENCES 



"Preserving Eggs," U. S. Department of Agriculture Farmers' Bulletin 

 No. 1109 by J. W. Kinghorne. 



