THE EGG 101 



of the egg, looking especially for the parts mentioned in the 

 text. A portion of the albumen may be dropped into boiling 

 water to see the effect of heat upon same. Different eggs 

 should be compared to see the different colors of yolks. Ex- 

 amine the pieces of shell carefully and find the small pores 

 or openings through which air enters the egg. Some eggs 

 may be hard boiled and studied to show the normal position 

 of the contents. 



Exercise No. 16. — An old hen which is in laying con- 

 dition should be secured and killed by bleeding. With the 

 aid of a knife the teacher can open the abdomen by making 

 a long cut down the breast bone clear to the tail. The skin 

 on each side can be laid back and after removing the gizzard 

 and intestines the ovary and reproductive organs can be 

 easily seen. The class can then be shown the different organs 

 and parts of organs which are utilized in manufacturing the 

 eggs. If the birds selected are in good laying condition an 

 egg can often be found partly formed in the oviduct. 



Exercise No. 17. — If the school has facilities for domestic 

 science work the girls will find considerable value from one 

 or more exercises dealing with the preparation of eggs for 

 human food. After the eggs are prepared a lunch may be 

 served to which the boys may be invited and all may become 

 familiar with the appearance and taste of eggs prepared in 

 different ways. At this time the digestibility and health- 

 fulness of the different methods may be explained 



THOUGHT QLIESTIONS 



1. Of what does the hen's egg consist? 



2. What are the functions of the egg? 



3. What is the nutritive value of the hen's egg for human food? 



4. Describe in a very general way the parts of the egg. 



5. What is the structure of the egg shell? 



6. How does the porous structure of the shell affect the keeping quahty 



of the egg? 



7. What material is often used to preserve eggs for home consumption? 



8. What are known as shell membranes and where do they lie? 



9. Where is the air cell located and how is it formed? 



