18 



effective, and there is room for much investigation in this direction. 

 The moditication known as Oregon winter wash, in which bluestone 

 is used to replace the salt, has been somewhat extensivel}^ used. This 

 was supposed to be virtually a mixture of sulphur-salt-lime and Bor- 

 deaux, but chemically, at least, it is not. Theoreticall}', it would 

 seem that an actual mixture of the two sprays would be better. In 

 places where it is necessarv to spra}^ for both the apple scab and the 

 San Jose scale, a series of experiments to test the double efficacy of 

 such a mixture is desirable. Where the San Jose scale occurs, present 

 experience indicates that sulphur-salt-lime is the best spray. Where 

 a fungus alone is sprayed for, Bordeaux is probably the best fungicide. 



KEROSENE EMULSION. 



Kerosene gallons.. 2 



Whale-oil soap (or 1 quart soft soap) pound.. 5 



Water gallon . . 1 



Dissolve the soap in the boiling water and while still hot add to the 

 kerosene, taking care to keep the latter awa}^ from the tire. The whole 

 mixture is then violently agitated, preferably by being pumped back 

 on itself through an ordinary one-eighth-inch nozzle. Many forms of 

 spray pumps answer the purpose admirably. After four or five 

 minutes pumping the mixture will have a thick creamy consistency, 

 and if well made will stand indefinitoiy without free oil rising to the 

 surface. 



One quart of soft soap may be used instead of the one-half pound of 

 hard soap. 



Unless otherwise stated, the emulsion is to be used dissolved in water 

 in the proportion of 1 gallon of the emulsion to 15 to 20 gallons of 

 water. 



PARIS GREEN OR LONDON PURPLE. 



Paris green or London purple pound . . 1 



Lime --. do 1 



Water gallons. . 150 



Make a tine paste of the Paris green or London purple with a small 

 quantity of water, and then add to the lime which has been slaked in a 

 bucket. Pour the mixture through a strainer into the spray tank and 

 add the water. 



In some cases, notably for cabbage worms, the poison is better 

 applied dr3^ For this purpose 1 pound of the poison is mixed with 

 50 pounds of flour, air-slaked lime, or dust, care being taken to make 

 the mixture very thorough. This is to be applied to the plants, pref- 

 erabl}' in the earl}^ morning, when they are wet with dew. It may 

 be dusted on by sifting through a piece of coarse cheese cloth, or by 

 means of special apparatus made for the purpose. 



