176 REPORT OF THE BoTraNnicAL DEPARTMENT OF THE 
ently no difference between the rows sprayed with lime bordeaux 
and those sprayed with soda bordeaux. 
Further experimental evidence on the relative value of these 
two kinds of bordeaux for potatoes is furnished by an experiment 
made by F. A. Sirrine at Riverhead, Long Island, in 1905. A plat 
of potatoes containing eight rows 235 feet long and sprayed four 
times with lime bordeaux yielded at the rate of 211 bushels per 
acre, while another plat of eight rows similarly sprayed with soda 
bordeaux yielded only 176 bushels per acre, making a difference of 
35 bushels per acre in favor of the lime bordeaux. The two plats 
were only two rows apart. 
Certainly, the results of these experiments are not favorable to 
soda bordeaux. ‘The most that can be said for soda bordeaux is 
that it is probably about equal to lime bordeaux in efficiency and 
that its mechanical condition is slightly better. Poisons can not be 
used as safely with it as with-lime bordeaux. We advise the use 
of lime bordeaux. 
BORDEAUX WITH PARIS GREEN VS. BORDEAUX 
ALONE. 
The Station made an experiment on this in 1904. There was no 
injury to the foliage and the yield was in favor of bordeaux with 
paris green by 7% bushels per acre.2? Another experiment was 
made in 1905. Again there was no injury to the foliage and the 
yield was in favor of bordeaux with paris green by five bushels per 
acre. In the latter experiment there were 15 rows 86 feet long. 
Five rows were sprayed five times with bordeaux and paris green 
(one pound to fifty gallons), five with bordeaux only and the other 
five (checks) with paris green in lime water (one pound to fifty 
gallons). The rows of the different treatments alternated with each 
other as in the ten-year experiment. The spraying was done with 
a knapsack sprayer very thoroughly and as uniformly as possible. 
The quantity of bourdeaux used varied from 100 to 300 gallons per 
acre in different sprayings according to the size of the plants. In 
order to make sure that the bordeaux used was the same in both 
cases the following method was employed in each spraying: A 

® Details of this experiment given in Bulletin 267, pp. 269-278. 
