COFFEE ANALYSES AND MANURES. 2I1 
Phosphoric Acid... Ui 1 20) 26D 
Sulpburic Acid ... o me i FON6 
Carbonic Acid ... aes, asp Bi olooe 
Chlorine ... ae see ie ee 028 
Silica fT, Ae als uF Ae ODA 
Oxide of Iron ... cS. as, wil OOS 
3°300 
‘- I will be noticed that there is nearly 11 per cent. 
of fat and 15 per cent. of nitrogen present in every 
100 parts by weight of this parchment coffee ; also that 
in the ash constituents potash stands out very promi- 
nently and that phosphoric acid exists in larger quantity 
than either lime or magnesia.” 
Mr. Hughes’ analysis gives the proportion of nitrogen 
which is absent from the analysis of the ashes, already 
quoted. The proportion of ashes in Mr. Hughes’ 
specimen was 3°30 out of 100 parts, of nearly 34 per 
cent mineral matter. Of this mineral matter again, over 
14 was potash, or more than one-half of the whole 
instead of more than one-half in the analysis of clean 
beans. Of the remainder, carbonic acid, phosphoric 
acid magnesia, and lime, occupy much the same relative 
position as in the old analysis of beans. The result 
of the addition of the parchment skin seems to be 
mainly to reduce the proportion of potash, but silicd 
is not present in the quantity we should have expected 
as a consequence. Then follows analysis of healthy 
coffee leaves, regarding which Mr. Hughes writes :— 
““Tt will be noticed that the nitrogen in these par- 
tially-dried (sun-dried) coffee leaves amounts to 2°679 
per cent. while the seed (commonly called bean) only 
contains 1°470 per cent. Also that the leaves contain 
2'078 potash and 352 phosphoric acid as against 1°342 
potash and °260 phosphoric acid contained in the 
parchment coffee. Hence if equal weights are taken 
in each case, sun-dried leaves are more exhausting in 
the important elements than ordinary parchment coffee, 
Consequently it follows that exposure to wind tends to 
exhaust the productive powers of an estate ina very 
serious degree ; a fact which practical planters fully 
recognise.” 
Of course if exposure to wind exhausts an estate, 
much more does leaf disease, and much more do the 
two combined. We ought, therefore, to top low and 
provide shelter on ‘“‘ blown” places, and use the lime 
and sulphur remedy against leaf disease’ there and 
everywhere. Mr Hughes gives figures for the weight 
‘of healthy and diseased leaves, shewing that 10 dis- 
eased leaves, in one case, weighed only 204 grains 
against 275 for 10 healthy specimens. If a coffee tree 
