42 PLANT DISEASES 



drained, and then plunged and agitated in the manner 

 described above. This operation should be repeated 

 six .or eight times during the immersion, which should 

 be continued ten minutes. In this way every portion 

 of the seed will be subjected to the action of the 

 scalding water. 



'After removing the grain from the scalding water, 

 spread on a clean floor or piece of canvas to dry. The 

 layer of grain should not be over 3 inches thick. 



* The important precautions to be taken are as follows : 



(1) Maintain the proper temperature of the water (132 to 

 133 K), in no case allowing it to rise higher than 135 F. ; 



(2) see that the volume of scalding water is much greater 

 (at least six or eight times) than that of the seed treated 

 at anyone time; (3) never fill the basket or sack con- 

 taining the seed entirely full, but always leave room for 

 the grain to move about freely; (4) leave the seed in 

 the second vessel of water ten minutes.' 



RESIN COMPOUND. Professer Webber gives the following 

 formula : 



Resin .... 8 pounds. 

 Sal soda . 4 pounds. 



Water . . . . i quart. 

 After boiling, add sufficient water to make five gallons 

 of stock solution. 



Place the resin and sal soda in a comparatively large 

 kettle with one quart of water. Boil, meanwhile stirring 

 briskly, until the resin and sal soda are thoroughly melted 

 together and form a frothy mixture without lumps. Now 

 add about four gallons of cold water, pouring it in rather 

 slowly and with short intervals between to avoid chilling 

 the mixture too suddenly. When all the water has been 



