GRAIN RATIONS FOR Cows. AS 

ITI. On the other plots, however, the charlock had greatly 
revived. and was running to. seed, although the leaves, 
especially on the sulphate of copper plots, appeared to 
have been permanently injured. An additional dressing ot 
a one per cent. solution of sulphate of copper at the rate of 
50 gallons per acre was applied to one-half of Plots I., Il., 
IV;-and Vion June roth, but it did mot make very much 
difference in the appearance of the plots. 
The plots at Melyniog Fawr were visited also, but here 
none of the dressings were successful. The sulphate of 
copper, however, was slightly more effective, as in the other 
centres, than the sulphate of iron. 
In these experiments sulphate of iron failed altogether to 
produce any appreciable effect. Sulphate of copper gave 
better results, although, it must be admitted, they were far 
OMsatistactonye in ome jcase “only; Plot Ill at 
Penrhyn, did the sulphate of copper have any effect of 
real value. But there is no doubt that, on most of the 
Spies plot to which it was applied; it succeeted) in 
checking for a time the growth of the charlock, which 
Subsequently, however, revived and seeded. It is clear 
that spraying, if carried out under favourable circumstances, 
may be attended with success. But the results depend 
largely upon certain conditions, one of the chief of which 
appears to be the age of the charlock. The dressings do not 
seem to be so effective by any means when the plant is in 
DiGommmdom when it) 1s) sprayed) at anvearlier stage, |) it “is 
observed with respect to the relative value of sulphate 
of copper and sulphate of iron that the experiments conducted 
by this College agree with the majority of those carried out 
in different parts of England, in which, likewise, sulphate of 
copper produced the better results. As far as the effect on 
the corn is concerned, it is stated that in no case was it 
injured by any of the dressings to any appreciable extent. 

GRAIN RATIONS FOR COWS. 
For a number of years past experiments in the feeding of 
dairy cows have been carried on in summer under the direction 
