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BULLETIN 132, U. S. DEPARTMENT OF AGRICULTURE. 
ARITHMETIC. 
Problems on the value of selecting and testing seeds of the various crops should 
be developed for this month. Let the exercises involve the value of time spent in 
selecting and testing, the time spent in replanting, and the effect of untested seed 
on the stand and the ultimate yields. Let these exercises as nearly as possible be 
based on data gathered from the community. These processes may be multiplied 
to meet the needs of the different classes in the subject of arithmetic. Problems on 
the cost of spraying materials, the time spent in spraying, and the increased yield 
should be developed. Comparison should be made of the yields of sprayed and 
unsprayed trees, and problems developed on these as a basis. The value of sprays 
in prolonging the lives of plants should be estimated. 
Fig. 6. — Practice in pruning. 
Useful publications to be used in connection with this work are: Bureau of Ento- 
mology Circular No. 42, How to Control San Jose Scale; and Farmers' Bulletin 243, 
Fungicides and Their Use in Preventing Diseases of Fruits. 
EXCURSIONS AND PRACTICAL WORK. 
Excursions should be made this month to orchards for the purpose of observing 
methods in spraying and for practice in the use of spraying mixtures and devices. 
Excursions should also be made for the purpose of observing pruning and for practice 
in the same. 
Practical work in testing seeds, both in the school and the home, should be engaged 
in. The actual work at school should be confined largely to school-garden seeds and 
those to be used by the club members in their contest plats. 
