258 REPORT OF THE DEPARTMENT OF BOTANY OF THE 
“Iron Age” sprayer. In the first three sprayings one nozzle per 
row was used; in the last three sprayings, two nozzles per row. 
The dates of spraying were: July 5, 11, 17, 23, 31 and August 7. 
The bordeaux used was of the 6-6-50 formula. The water re- 
quired was pumped by hand and hauled 100 rods. In all six spray- 
ings one-half pound of paris green and one quart of arsenite of soda 
stock solution were added to each 50 gallons of bordeaux. Four 
check rows, 518 feet long by 3 feet wide were left unsprayed. These 
were treated four times with paris green. The check rows, being 
more severely attacked by early blight and flea beetles, died about 
two weeks earlier than the sprayed rows. There was also considsr- 
able tip burn which was partially controlled by the spraying. Late 
blight and rot were wholly absent and no damage was done by bugs. 
The items of expense were as follows: 
¥25 / ibs. Copper’ sulphates 4106 Ae Le. ee $12 50 
rac. Ibs. lime) . wreak sale. Ape ete 3 eet oe ee oe 75 
24 dbs.pisal. soda.) 3.720% uote 8s acs beet ea he rent ee 36 
6 Ibs. white “arsenic: (@:\ 180,22 4.0. bates Ree ee ee go 
Sélbs. paris green. @ 350 Msc ciacts ven ee ee eee ee eee ee 2 80 
18 lirselaborwfior:manu@) 20024...c8 a0 cunt een ba ee eh ee 3 60 
18 hrs. labor. for. horse DOC ficn-. csc cheeses es ee I 80 
Wear Of Sprayer. ci Soin cules ls wi elgind tte oabeceheletener stan. Pree eae 5 00 
VOtal Sicyere sags wala og es bale, cee Oh alee Be ee ea S27 
The test rows (variety Green Mountain) yielded as follows: 
Average of two sprayed rows, 432 Ibs.=201.8 bu. per acre. 
Average of two check rows, 342 lbs.==159.8 bu. per acre. 
Increase in yield due to spraying, 42 bu. per acre. 
The market price of potatoes at digging time being 75 cents per 
bushel the increase had a value of $31.50. After deducting the ex- 
pense of spraying, $6.93 per acre, there remains a net proft of 
$24.57 per acre. 
THE VERONA EXPERIMENT. 
Conducted by F. G. Rathbun, Verona, N. Y., who sprayed ten 
acres twice with a one-horse, four-row “ Spramotor ” sprayer carry- 
ing three nozzles per row and applying about 75 gallons of bordeaux 
per acre. The dates of spraying were August 3-5 and 27-30. There 
were three check rows, 792 x 3 feet. July 13-15-16 the entire field 
was treated with »aris green in water. In the first spraying 
