62 MAINE AGRICULTURAL EXPERIMENT STATION. I9OI. 



Automatic Sprayers: In large fields automatic sprayers which 

 will cover four rows at once may be used with satisfactory 

 results. Such a machine consists essentially of a barrel, con- 

 taining an agitator for keeping the liquid stirred, mounted upon 

 a two wheeled cart, a force pump ( which mav be a hand pump, 

 but preferably one driven by a spocket chain in the rear; with 

 nozzles which can be set to any width of row. To give the best 

 results two nozzls should be used for each row. Combinations 

 of two nozzles can be obtained from dealers. 



formulas. 

 Caution : The following formulas are for use on the potato. 

 In many cases they are net adapted for more tender plants. 

 Keep all poisons carefully labelled and out of the reach o 1 chil- 

 dren and animals. 



Formula 1. corrosive sublimate. 



Corrosive Sublimate . 2 ounces 



AVater 15 gallons 



The corrosive sublimate dissolves readily in water. 



Formula la. 



Formaline (40% solution formaldehyde) 8 fluid ounces 



\Yater 15 gallons 



Formula 2. bordeaux mixture. 



Copper Sulphate 5 pounds 



Fresh Lime (unslacked ) 5 pounds 



Water 50 gallons* 



The copper salt is dissolved and the lime slacked in separate 

 vessels. Dissolve the copper sulphate ('"'Blue ^cone") in about 

 two gallons of hot water in a wooden or earthern vessel by 

 stirring, or by suspending it from the top of the vessel in a cloth 

 bag ; pour the solution into the tank or barrel used for spraying 

 and fill one-third to one-half full of water. Slack the lime by 

 the addition of a small quantity of water, and when slacked add 

 two or three gallons of -water and stir freely. Pour the milk of 

 lime thus made into the sulphate solution, passing it through a 

 brass wire strainer of about 30 meshes, to the inch (No. 50) 

 or through a cheese-cloth backed by common window screen. 



: An ordinary oil barrel holds about 50 gallons. 



