656 Rural School Leaflet. 



Per cent In i quart 



Water 87 29 . 93 ounces 



Fat 4 1-38 " 



Casein 2.6 .89 



Albumen 7 .24 " 



Sugar 5 1 . 72 



Ash 7 .24 



(( 



100 34.40 oz. 

 LESSON in. THE PARTS OF AN EGG. Fig. 5. 



(For advanced pupils.) 



Bv James E. Rice. 

 Object.— To teach the structure and function of the egg, to demon- 

 strate natural physical laws which are there illustrated, and to train the 

 pupil in accuracy of observation. 



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Fig. 5. — Diagram of a lien's egg, in longitudinal section. 



Suggestions to the teacher. — This practical exercise can be given best 

 by affording each pupil an opportunity to observe for himself the points 

 to be brought out in the lesson. This can be accomplished in progressive 

 steps by a statement of the things to be done and to be observed. Later, 

 the observation can be aided by blackboard or chart illustration showing 

 roughly in colors the structure of the egg, with a printed word description 

 by which the pupil may compare and correct his drawings. 



Materials. — Each pupil should be supplied with two eggs, one with 

 light shell, the other with dark shell if possible; two saucers; one draw- 

 ing pencil ; one box of colored lead pencils ; and a knife. 



For the general use of the class there should be a sfood lens ; an 

 alcohol lamp and kettle, or other facilities for boiling eggs ; an egg- 



