162 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
SUMMARY OF BUSINESS EXPERIMENTS IN IQO4. 
Total area sprayed in fourteen experiments, 180 acres. 
Average increase in yield per acre, 62 1-4 bushels. 
Average total cost of spraying per acre, $ 4.98. 
Average cost per acre for each spraying, 93 cents. 
Average net profit per acre, $24.86. 
SUMMARY OF BUSINESS EXPERIMENTS IN 1903. 
Total area sprayed in six experiments, 61 I-6 acres. 
Average increase in yield per acre, 57 bushels. 
Average total cost of spraying per acre, $4.98. 
Average cost per acre for each spraying, $1.07. 
Average net profit per acre, $23.47. 
Average net profit for three years, $22.79 per acre. 
