115 



are separately delivered. The revolving cylinder is the only moving 

 part of the machine, and owing to its extreme simplicity cannot get out 

 of order. The capacity of this Huller when worked by one man is 

 from 50 to 801bs of dry cherry coffee per hour. It is suitable for the 

 treatment of both Arabian and Liberian Coffee ; but when intended to 

 clean the latter, it is necessary to have a special grid ; on account of 

 the Liberian beans being so much larger than the Arabian. Purchasers 

 should state in their orders, which kind of coffee it is intended to treat ; 

 although the machine can be supplied with two grids if desired, so that 

 both kinds can be cleaned. The cost of the extra grid is 7/6. 

 Price, packed for shipment £10. 



" The machine itself weighs 801bs : but when packed for shipment 

 the gross weight is 104lbs. 



" This Huller is also made in larger sizes, suitable for being worked bv 

 animal, steam, or water power." 



SUGAR CANE DISEASE AND EXHAUSTION OF 



SOIL. 



The diseases to which the Sugar Cane sometime succumbs, depend 

 very often on weakened vitality, which may be due to various causes 

 such as planting tops of unhealthy canes ; planting the cane of the dis- 

 trict always in the same place without ever getting an exchange of tops 

 from a distant estate ; exhaustion of soil, which is the subject of this note. 



Dr. T. L. Phi'pson, the well known authority on the chemistry of the 

 Sugar Cane, gives the following as the rough average composition! of 

 the ash of the ripe cane and its leaves : — 



Silica 



43.0 



Phosphoric acid 



6.0 



Sulphuric acid 



8.0 



Chlorine 



4.5 



Lime 



10.0 



Magnesia 



6.5 



Potash 



18.0 



Soda 



2 



Oxide of Iron, manganese, and 





loss in analysis 



2.0 





100.0 



It is generally supposed that, as the geological map of Jamaica shows 

 that the greater part of the surface formations consist of limestone, 

 there is an abundance of lime in the soil, and no need to apply it as 

 manure, but it should not be forgotten that while the rain carries off lar^e 

 quantities of lime into the rivers, another portion is used up by the cul- 

 tivation of plants, until the soil becomes exhausted of lime, which is an 

 essential part of plant food. The exhaustion of the lime may be taken as 



