19 



be tested by the application of materials containing equal weights of 

 these salts per unit of water. 



• Wholesale cost of materials from which calculations in the last two columns of the above table were 

 made: Copper sulphate, 5§ cents per pound ; sal soda, li cents per pound; strong ammonia (26°), 7 cents 

 per pound ; copper carbonate precipitated from copper sulphate by sal soda, 13.87 cents per pound. 



Delaware College, Newark, Del. 



notes on fungicides and a new spraying pump. 

 By B. T. Galloway. 



In connection with the papers found elsewhere in the Journal, it 

 would seem proper to say something in regard to the preparation of 

 fungicides, particularly those recommended for use. The manner of 

 preparing most of these, however, has been so fully described in former 

 publications that we deem it unnecessary to repeat the descriptions 

 here. We will say, in passing, that the circulars— Nos. 5 and 6 of the 

 Section of Vegetable Pathology— containing this information will be 

 forwarded to all those desiring to consult them. 



Aside from the old and well established preventives and remedies, 

 there are several new ones which we think it would be well to call at- 

 tention to in order that they may be more fully tested. The first of 

 these is a solution of copper acetate or verdigris, which was mentioned 

 in Volume 5, Number IV, of the Journal. It is prepared as follows : 



Dissolve 3 pounds of powdered verdigris in 6 to 8 gallons of water 

 and after standing for twenty-four hours dilute to 22 gallons. If de- 

 sired the amount of verdigris may be increased to 4 pounds without in- 

 jury to the plants. 



This preparation being comparatively cheap and easily prepared, it 

 would be well to test it for downy mildew and black-rot of the grape, 



