Lessons in Nature Study. 



THE HEN'S EGG. 



I. Raw. 



Hold up before your class a fresh egg. 

 How do you know ? What is its shape ? 

 you ever see a larger egg 

 eggs white, like this one ? 

 eggs, blue eggs, etc. ? 



What kinds of hens lay brown eggs ? Describe the shell. 

 What shape is it ? Is it rough or smooth ? Examine care- 

 fully the surface of the egg. Hold it to your eye and close 

 the other eye. What do you see ? Place the lips at the 



What is this? 

 Its color ? Did 



? What kind was it? Are all 

 Name a bird that has speckled 



FIG. 9. HEN'S EGG, FRESH. 



large end of the egg. Hold them there a moment. Is it 

 warm or cold ? Place the small end of the egg to your lips. 

 Is this end warmer or colder than the large end ? Put the 

 egg in clear water. Will it sink or float ? Put it in strong 

 brine. Will it sink or float now ? W T hy ? Fill the vessel 

 half with strong brine, then carefully add a quantity of 

 fresh water so as not to mix it with the brine. Why does 

 the egg sink in the water until it reaches the brine, and 

 float in the middle of the glass ? 



Now we will break the egg. We must do it carefully, so 

 as not to break the inside parts of the egg. I will crack the 

 shell so, and put the egg into this saucer. Now come and 

 look at this egg, and see what we can find inside it ; but 

 first let us see what is still in the, shell. How many layers 



