180 NATURE TEACHING. 



of boiling water. When dissolved add two 

 gallons of kerosene to the hot liquid and 

 immediately churn up well with a syringe until 

 the mixture becomes creamy. This is the 

 stock solution, and, before using, water should 

 be added to make it up to thirty- three gallons. 

 Only rain-water or other soft water (that is 

 without lime) must be used. 



(2.) Whale oil soap. Dissolve one pound 

 of the soap in one or two gallons of warm 

 water, and use when cold. 



