COFFEE ANALYSES AND MANURES. 213 
Seed. | Pulp. | Leaf, | Total. 
iPar- 
7 ewt, tially 
Parch- pie dried. Weht, 
ment. uP 124000. 
leaves 
lb. lb. lb. lbs 
—784 |—849 |—247 
The Ash Consists of— 
Potash jo: .: ac) LOG 75 lye, 23° 
Soda ay, Sed “fy 3 t2 20 
Lime id 1:5 4:2 Ge 
_ Magnesia .. 7, son lak oes 4°3 
Phosporic Acid . pal oF, y) 3°7 
Sulphuric Acid . 6 5 6 Gy 
Chlorine ... od 4 2 8 
Oxides of Iron va 2, 2 Lek 
Silica ne oy 6 1°6 2°9 
Carbonic Acid aes 35 2°4 13:2 
Ib. 25°97) 15:5. |_ 18'8 60:2 
It will be seen that 60-2 lb of the ash of beans, 
pulp and leaves, consisted of 23°3, or considerably 
more than one-third of the whole of potash, with 3°7 
only of phosphoric acid or 1 to 7 of potash; lime 
ranging so high as 7°2 and magnesia at 4°3. Phos- 
phoric acid is low in pulp and leaves, but lime is 
high in both. Mr. Hughes states that the nitrogen 
removed from an acre by a crop of 7 cwt. of coffee 
would be 21 lb. which could be supplied by 300 Ib. 
or + 1b. per tree of white castor cake. M. Ville would 
differ from Mr. Hughes in saying that ‘“ practically, 
therefore, at least the full amount of nitrogen removed 
should be returned.” M, Ville considers one-half of 
this substance sufficient, even in Europe, and, if the 
principle is true, less than one-half ought to suffice 
in this country of tropical rain. It is better, however, 
fo err on the safe side.. White castor cake contains 
most nitrogen in proportion to bulk and weight of 
nitrogenous substances available, and so its use will 
save carriage. Wereally come back to the old formula 
of castor cake and bones, or better still castor cake, 
and superphosphate, although probably a mixture of 
steamed hones and superphosphate would be prefer- 
able and more economical. Of course, if sufficient 
cattle manure is available, the castor cake can be 
dispensed with. In that case, the bones or superpios- 
