540 



ADDENDUM 



should be kept well stirred, especially during the early stages of the 

 process. The boiling should continue until the sulfur granules are evi- 

 dently dissolved, generally 40 to 60 minutes. Pour or strain the clear 

 liquid into a barrel or other storage vessel that can be completely filled 

 or corked, and cut off air contact with a thin layer of paraffin oil, or 

 any other heavy oil, to prevent formation of crystals. 



To test the concentration of the commercial and the home-made solu- 

 tions, secure a Beaume hydrometer at the drug store, with a range of 

 25 to 35 degrees. In testing the solution, pour some of the clear red- 

 dish liquid into any deep receptacle, deeper than the hydrometer is 

 long, and when full gently drop the instrument into the solution and 

 wait until it comes to rest. Then read on the hydrometer the degree 

 of concentration, which will be the one just at the surface of the liquid. 

 When the degree of concentration of the solution is known, the proper 

 dilution may be obtained by referring to the following figures : 



Degree on Hy- 

 drometer 



Gallons of Water to One Gallon of the Lime-sulfur 



>> 



For San Jose, 

 Dormant Trees 



For Blister Mite, 

 Dormant Trees 



Leaf-curl, Dor- 

 mant Trees 



Summer Spray of 

 Apple, Pear, 

 Cherry 



25 

 26 

 27 

 28 

 29 

 30 

 31 

 32 

 33 

 34 

 35 



5^ 

 5| 

 6 



^ 



6f 

 7 



7f 

 8 

 8§ 

 9 



71 

 8i 

 8f 

 9 



9i 

 10 



m 

 11 



12 



11 



12 



12§ 



13 



14 



14i 



15 



15i 



16 



m 



31 



32^ 



33i 



35 



36 



37i 



39 



40 



41 



42J 



43J 



The usual or average strength of these concentrated lime-sulfurs is 

 about 32° ; for dormant trees, a 1-10 dilution is usual, and for trees 



