94 [ DISEASES OF Cm? us TREES 



meantime stirring the mixture continuously until the 

 whole takes a uniform yellowish white colour. The 

 preparation should be made in an iron receptacle of the 

 capacity of from 1 50 to 200 litres, that is large enough 

 to prevent the mixture from being blown out during 

 ebullition. The receptacle is filled with too litres of 

 water, and the level of the water marked by means of 

 a stick, the loss of water by evaporation being made up 

 now and then by fresh additions of water, in the course 

 of preparation. The receptacle is then placed on a fire, 

 with only 25 litres of water, and as soon as the water 

 becomes lukewarm, the pieces of quick lime to the weight 

 of 10 kilog. are thrown into the receptacle. When the 

 lime is dissolved and the boiling point is reached, the 

 sulphur (20 kilog.) is thrown in gradually but contin- 

 uously, at the same time stirring the mixture with a stick 

 or wooden ladle and adding some water if the mixture 

 becomes too thick. The sulphur should be passed 

 through a sieve of copper or brass gauze before use. 

 Stirring should be thorough and should be continued 

 until the mixture takes the uniform yellowish white colour 

 as above mentioned. The quantity of water is then 

 made up to 100. litres with a further addition of 10 to 15 

 litres to make good the loss by evaporation. The 

 mixture should then be kept boiling for three quarters 

 of an hour or for an hour, stirring now and then with 

 the wooden ladle or stick, until the mixture passes from 

 a dirty orange colour to chocolate and becomes perfectly 

 liquid. Boiling is continued until no sulphur is left 

 floating on the surface of the liquid, and the formation of 

 froth has ceased. The mixture will then present the 

 appearance of a reddish liquid, with yellowish mealy 

 particles moving in it. It is then allowed to cool and is 

 ready for use, mixed in the proportion of 5 to 10 litres 

 to 100 litres of fresh water. The condensed mixture can 

 be kept in closed receptacles in good condition for some 

 months, but it is always preferable to have it fresh when- 

 ever required. For summer use the strength of the spray 



