60 BOARD OF AGRICULTURE. [Pub. Doc. 



tields, ten and twenty acres or more, it is advisable to use 

 an automatic sprayer. In our practice we have found those 

 that spray four rows better than where it is attempted to 

 spray a larger number at one time. The Vermorel is the 

 most satisfactory spraying nozzle which Ave have used. It 

 throws a finer spray than others and is on this account 

 easily clogged, and care must be exercised that the spraying 

 mixture is carefully strained. 



Formulas. 

 Caution. — The following formulas are for use on the 

 potato. In many cases they are not adapted for more tender 

 plants. Keep all poisons carefully labelled and out of the 

 reach of children and animals. 



Formula 1. Corrosive Sublimate. 



Corrosive sublimate, 2 ounces. 



Water, 15 gallons. 



The corrosive sublimate dissolves readily in water. 



Formula la. Formaline. 



Formaline (40 per cent solution formaldehyde), 8 fluid ounces. 

 Water, 15 gallons. 



Formula 2. Bordeaux Mixture. 



Copper sulphate, 5 pounds. 



Fresh lime (unslacked), 5 pounds. 



W T ater, 50 gallons.* 



The copper salt is dissolved and the lime slacked in sepa- 

 rate vessels. Dissolve the copper sulphate (blue stone) in 

 about 2 gallons of hot water, in a wooden or earthen 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 2 or 3 gallons of water and stir freely. 

 Pour the milk of lime thus made into the sulphate, passing 

 it through a brass wire strainer of about 30 meshes to the 



* An ordinary oil barrel holds about 50 gallons. 



