142 Report oF THE BOTANICAL DEPARTMENT OF THE 
120 pounds paris green at 17c........ San Mesoeiae eeeee $2040 
16 days labor for man at $1.75.......... SPs 2 ee 
16 days labor for horse at $1.00........ beeen eens oo eee 
OCarting bordeaux to the field....... Pe tara 2. RD. Oe 2 00 
Wear on sprayer’and bordeaux tank............. “pee 
ROTA) oe et. Baea es se tie Se PEEP PTE Te 
Total cost. of spraying per Acre, °!.20csj <tsiete.aieis sets ee $6 17 
Cost per acre for each spraying................- Rhy hina 17 
At 55 cents per bushel, the price at digging time, 93 bushels of 
potatves would have a value of $51.15. Subtracting $6.17, the 
cost of spraying, there remains a net profit of $44.98 per acre. 
SUMMARY OF BUSINESS EXPERIMENTS IN 1904. 
The principal features of the fourteen business experiments 
are shown in the following table: 
TABLE XI.—SHowinGa Resutts or Business EXPERIMENTS. 




| Total c 
No. of Increase eae ost r 
Area, : TA eo | ost of per acre | Net”profit 
EXPERIMENT. times in yield : 
sprayed. | -sotaved. «| per acre, |. PptAvene 9) « S0r Coe] aa 
Acres. Bu 
Gainesville........... 2 4 74% $3.19 $0 80 $28 92 
West Henrietta...... 12 8 130 4 89 61 60 11 
Spencerport..:...-5>: 84 6 21% 3 86 64 6 72 
Clifton Springs....... 12 ips 834 4 62 924 28 70 
Denman, wis Sete 22 4 214 6 98 1 744 3 85 
Madrid e2 oF vniiatse soca 24 4 354 6 75 1 69 2 95 
IMEBILOTIO lees tin ie = are 8 if 114% 5 83 834 40 07 
POTS eicn chreteped eons 16 4 —3} 1 80 45 —2 94 
Sliterhata. ceees Actas 3 3 244 4 92 1 64 5 12 
Wioodburyres eatin 5: 14 re 107 5) 32 76 58 90 
Farmingdale......... 15 4 67 3 05 764 37 15 
Mattitiickn cur sos 15% 10 144 Dy 51 1 19 
Southampton, No. 1.. 14 8 88 eval 90 32 39 
Southampton, No. 2.. 31 8 93 6 17 77 44 98 

Total area sprayed in fourteen experiments, 180 acres. 
Average increase in yield per acre, 6214 bushels.*° 
* The average increase in yield per acre may be computed in two ways: 
First, by taking the sum of the figures in the column headed “ Increase in 
yield per acre” anu dividing by 14, the number of experiments; second, by 
finding the total increase in yield in each experiment (increase per acre 
multiplied by the number of acres), adding these totals together and divid- 
ing by 180, the total acreage. 
The averages given are computed by the first method, which we regard 
as the better one for our purpose because the figures obtained by it show 
the average gain due to spraying in 14 different places without regard to 
