+1 
6. BORDEAUX MIXTURE. 
ev RCMIGMREC. en SN Sse els ae Baie sh sehen es acon! ounces... 6 
TSE. LS SE he SB ea Re nea ee ee ee "Fi bry 4 
Mg clea Se ee Aha" 6 Se oe ee et ee ee as gallons.. 74 
This was made in the usual way by dissolving in one vessel the cop- 
per and slaking the lime in another, then mixing the two solutions, and 
diluting to 74 gallons. 
7. COPPER ACETATE. 
DE Ee ES ig eee Se te ee eee ee ounce... 4 
NR SE Ee er anne re eo aS Saale SP a AS ee oe gallons... 5 
The copper acetate was simply dissolved in the water 24 hours pre- 
vious to using it. 
8. COPPER CHLORIDE MIXTURE. 
Semperrlabe eee ose a ees WY Ses bases ounce.. 4 
ieee nNERE De TOES T Eon nae fg Se) Ae far ee = Se SS See d6.2.4! + 
Ee BE eS EE a ee ee gallons.. 5 
The copper sulphate was dissolved in a quart of water and the calcium 
chloride was treated in the same way. The two solutions were then 
poured together, and enough water added to make 5 gallons. 
In preparing the fungicides the ammoniacal solution of copper car- 
bonate, containing 5 ounces of copper carbonate and 5 pints of aqua 
ammonia to 49 gallons of water was taken as the standard. In other 
words, all the other fungicides used contained approximately the same 
amount of the compound of copper as the ammoniacal copper carbonate 
solution, standard strength. It seemed especially desirable to test the 
fungicides in this way, since, if it were found, for example, that the 
Bordeaux mixture, containing only 12 ounces of copper sulphate to 22 
gallons of water, was as effective against black rot as the old formula, 
in which 6 pounds to 22 gallons were used, there would be a great sav- 
ing in cost and a decided advantage as regards ease of preparation and 
application. Moreover, on account of the nature of copper, hygien- 
ically considered and as regards its effect on the soil from long-con- 
tinued use, it is important to reduce the amount applied to a minimum. 
The second question upon which information was desired may be 
briefly stated as follows: 
(2) A comparison of two fungicides containing no copper with those 
given under question 1. 
The fungicides used in this case were— 
9. POTASSIUM SULPHIDE SOLUTION. 
Sian te SII a) 259 = he es ke Ses ao ounce.. 4 
ee I errs Soe Ae Se 2 ok Be gallons... 5 
The potassium sulphide was added to the full quantity of water and 
then stirred until it was dissolved. 
10. SODIUM HYPOSULPHITE SOLUTION. 
BamiumiunmpmOsml piling sare a ounce.. 4 
SEES Ss Sel et Oe ee el rrr gallons... 5 
This was prepared the same as No. 9, 
