POULTRY MANAGEMENT 319 



ones? Eggs are usually sold by the dozen, but in some 

 places by the pound. Which way is fairer? 



EXERCISE. Drinking Fountain. Have some one make 

 a drinking fountain like the one described and figured, and 

 show how it works (Fig. 201). 



EXERCISE. Testing Eggs. Let some form of tester be 

 used in testing eggs brought from homes or from a store. 

 Eggs are usually candled in some stores to detect any not 

 suitable for human food. - This is done thus: Put a candle 

 or stronger light in a dark box; have an oval hole a little 

 smaller than an egg in one side, even with the light; let that 

 part of the room where the testing is to be done be darkened 

 somewhat. Hold an egg over the hole and look for any 

 dark or clouded parts in the contents. Other forms of egg 

 testers are in use. The eggs in an incubator are usually 

 tested the sixth or seventh day to see if a live, growing 

 germ is present. 



EXERCISE. Preserving Eggs. Let some of the pupils 

 preserve a few dozen fresh eggs. April or May is a good 

 time to preserve them for winter use. The eggs may be 

 kept at home and the report of the trial made to the class 

 a few months later. Directions: Scald out a stone jar with 

 boiling water. Prepare a solution, using water that has been 

 first boiled and then cooled to ordinary temperature. To 

 each six quarts of water add one pint of water-glass pur- 

 chased at a drug store. Select clean (not washed) fresh eggs, 

 and place them in the jar. Pour the liquid over the eggs 

 covering them more than an inch above the top ones. Keep 

 them in a dark, cool, dry cellar. Sterile eggs keep best. 



Problems. A flock containing 28 pullets laid 1600 eggs 

 in January, February and March 



1. What was the average number of eggs from each. 



2. What was the average number of eggs from the flock 

 for each of the 90 days? 



