CITRUS DISEASES. 



J 15 



It should he noted that this gives the total number of dilutions, and 

 that the amount of water used would be nine i)arts to one of con- 

 centrate. 



In using' the liydrometer care nuist l)e taken to see that it is 

 cleaned between readings. A little vinegar will help if it becomes 

 coated with lime. The material to be tested should be free from 

 sediment and at air temperature. Best results will be obtained by 

 testing several days after the solution has been made. Read the 

 hydrometer scale at the general surface of the liquid, and not at 

 the point to w^hich the liquid is drawn up by capillary attraction 

 about the stem. 



While it is preferable that the proper dilution be figured out 

 from direct readings, using the rule given above, the following table 

 has been prepared as being more convenient. It gives the approxi- 

 mate dilutions necessary to prepare the strengths most connnonly 

 employed. Thirty-two degrees Baume has been taken as the stand- 

 ard strength 



Lime-Sulphur Dilution Table. 



Note. — One hundred gallons is the total dilution. To find the anKuint of water t( 

 1)1' used subtract the amount of eoncentrate indicated from oni- hundred. 

 Sp. Gr. r= Specific gravity. 



