34 The Cultivation and Preparation of Coffee 



with the following mixtures to fight this 

 dangerous plague : 



Black Soap ... 3 Ibs. 

 Carbonate of Soda . 2 Ibs. 

 Water ... 22 gallons. 



When, by means of the spraying with the 

 above mixture, the trees are free from the 

 plague, it is necessary to keep on protecting 

 them every two years by spraying with the 

 following solution : 



Sulphate of Copper . . 1J Ibs. 

 Black Soap 1J Ibs. 



Poli-sulphate of Potassium 1J Ibs. 



Water .... 22 gallons. 



The spraying must be effected by means of 

 well-made machines which are capable of pro- 

 ducing sufficient pressure and very fine ejection, 

 thus all the parts of the tree will be covered, 

 even under the leaves, without causing any 

 harm to the plant. 



The Bordeaux Mixture also produces excel- 

 lent results in general coffee diseases, even in 

 the most dangerous of all the diseases, the 

 Hemileia Vastatrix. 



From a note published in the New Hebrides 

 Islands, the following interesting passages are 

 extracted : " In these islands there is a fact 



