214 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
picking up and hauling to market of the increase is all extra 
labor. Mr. Dunn paid 114 cents per bushel for picking up the 
potatoes which makes the extra expense of that item alone $1.95 
per acre. He estimates the expense of hauling the potatoes from 
th field to the cellar at one cent per bushel, sorting one cent per 
bushel and hauling to market three cents per bushel, making in 
all an extra expense of 6144 cents per bushel or $8.45 per acre 
which must be subtracted from the $60.11. This leaves $51.66 
per acre or $619.92 for twelve acres. Making ample allowance 
for errors of all kinds it is safe to say that Mr. Dunn is at least 
$500 better off for having sprayed his potatoes the past season. 
THE SPENCERPORT EXPERIMENT. 
This experiment was made by F. E. Gott, Spencerport, N. Y. 
Two fields of potatoes, one of four acres and one of four and one- 
half acres, were sprayed six times with a home-made, two horse, 
three-row sprayer. The sprayer consisted of a two-wheeled cart 
carrying a fifty-gallon barrel in which was mounted an Empire 
King spray pump. (See Plate VII, fig. 2). Two men were 
required to operate it—one to pump and one to drive. There 
was but one Vermorel nozzle per row. About 38 gallons of 
bordeaux mixture per acre were applied at each spraying. Both 
fields were adjacent to a public road and ae rows in each field 
were left unsprayed. 
The east field—In this field the variety was Gold Coin. The 
unsprayed rows were 554 feet long by 3 feet wide, 26.2 rows being 
required to make an acre. The dates of spraying were July 25, 
August 1, 6, 13, 22 and September 10. 
When we examined the experiment on August 31 only the 
merest traces of late blight could be found even on the unsprayed 
rows. Although the sprayed rows had already received five 
applications they were only slightly better than the unsprayed. 
The only disease of any importance was one of unknown cause 
the SAN LOTS being dwarfed growth, curled leaves with brown- 
the most part; the same is true of the expense of fighting bugs. Hence, we 
have thought best to assume that these two items offset each other and to 
leave them both out of account. We believe that the one will about equal 
the other on the average. Of course this would not be true of the West 
Henrietta experiment because it so happened that no treatment for bugs was 
necessary. On the other hand, in the Long Island experiments -treatment 
for bugs constituted a large part of the expense of spraying. 
