December i, 1881.] THE TROPICAL AGRICULTURIST. 
of coffee you sent would not af 
Sometimes I think A 
inot make up my min 
They are both line sa 
sample 
value.' 
(7) ' 
bat ca 
(8) ' 
moil , 
they ]: 
mucli 
oontah 
being 
appear 
it was not an easy task to 
that had been produced on 
that the darker colour of 
have been duo to tho mi 
Bulphate of lime, &c., bavin; 
than the manure alone; 01 
immediate action of caustic 
having rendered certain usefi 
able ; or, finally, it was pro 
more leaves bad been kept 
Btruction of the fungus in Ai 
therefore, I tried to decide 
the leaves from ten trees c 
Using tbo average number 
following tallies give the res 
i shade better than B, 
about it." 
pies of coffee in parch- 
a veiy good outturn ; 
the selling I injured primaries, to count all leaves more than two 
inches in length, and to weigh the leaves as well as 
count them. 
On December 21st the trees were selected and strip- 
ped, the leaves put into baskets, and weighed and 
counted while fresh. The results were : — 
and smi 
)lour the 
unples 
nt on Harrow 
State of Tree as 
regards Crop, &e. 
Heavy crop, thin tree 
Do. 
Fah crop and tree 
fair condition 
A fine tree 
Do. ' 
Fail- crop and 
condition 
Bmall crop. fan 
rood 
Branches 
18 
diseased all over . . 
Small crop, line condi- 
tion 
Heavy crop, fair 
L0.1 
B.— S'uli'huukd Coffee. 
Numbei 
ll-sized 1 
974 
1,300 
1,300 
966 
1,800 
370 
2,295 
858 
10,599 
Stutc of Tree, 
Crop, dc. 
Small crop, tree diseased 
Fair crop, good condition 
Do. 
Small crop, line tree . . 
1 ) crop, tree " shuck" 
Heavy crop, fair tree . . 
Do. 
Fair crop, good condition 
Do. 
Heavy crop 
Number of 
Primaries. 
10 
10 
10 
14 
21 
Number of 
fall-sized Leaves. 
1,010 
1,400 
650 
1,900 
438 
475 
337 
676 
998 
77* 
121 8,662 
On comparing these tables it will be seen that the 
tin - not Bulphured had more leaves in the proportion 
U 10,699 : 8,662. On considering the matter further, 
mid comparing the trees selected, it occurred, however, 
that had we selected trees le.^s irregular in point of 
size, condition, number of primaries, and other re- 
spects; and, moreover, had we counted all the leaves, 
in. t, l 1 of selecting < »nly those which were eolisideied 
full -i. sed (a difnoult thing to determine properly) the 
results might be different. 
Since I was very anxious to get at the truth ..f the 
mutter, a number o! preliminary attempts were made 
to select some fair standard ol oompadBon. it was 
decided to select tree-, each oi which possessed It) uu- 
131 
A. — Unsulphubed Coffer. 
B. — Sulphured 
(Jol-'l-'jOf ' 
Number of 
Number of 
Leaves over 
Weight 
Leaves over 
Weight 
2 inches 
of the 
2 inches 
of the 
long. 
Leaves. 
long. 
Leaves. 
2,868 
. 4£ lb. 
3,396 . . 
4* Lb. 
2,590 
2,734 . . 
t 
1,548 
. 2i 
1,330 . . 
3 
724 
. 1 
836 .. 
1 
658 
. 1 
1,318 .. 
852 
. L| 
940 . . 
li 
672 
. 1 
690 .. 
1 
638 
. 1 
454 
0i 
570 
. ] 
1,028 . . 
li 
2,302 
.4 
2,596 . . 
5J 
13,422 
"21i lb. 
15,322 
25| lb. 
On comparing these we find the unsi 
ave raged 1342-2 leaves per tree ; the sub 
The weight indicates about 631 unsulph 
the pound, but only 599 of those sulphii 
On January 20th, 1881, these observa 
peated with the same precautious, and 
nrnm the results: — 
lphured coffee 
hured 1532-2. 
u-ed leaves to 
B. — Sulphured Coffee. 
No. of Leaves over 
two inches long. 
2,266 
1,700 
1,066 
1,318 
792 
2,715 
1,118 
1,263 
1,980 
1,100 
15,323 
A. — TJhsulphubed Coffee. 
No. of Leaves over 
two inches long. 
1,892 
1,186 
1,469 
1,032 
896 
1,398 
1,036 
1,836 
2,332 
1,762 
14,839 
Total weight— 15 lb. Total weight— 8* lb. 
Comparing again, it appears decided that the darker 
colour of the sulphured coffee was (in part, at any 
rate) duo to the presence of more leaves in the pro- 
portion of about 1,532 leaves per tree, against about 
1,484, and that there was moro matter hi tbo sidphur- 
ed leaves, which only took about 839 to the pound, 
against 969. The chief reason why both sets of leaves 
weighed less than in December was on account of tho 
drier weather prevailing at the time of the January 
experinient. 
Before discussing this matter further, I will conclude 
the account of the Harrow experiment. The cost, I 
am informed, was R20-47 per acre ; sulphur at 
R190, and lime at R25'25 per ton in Colombp. 
It was found that seven men, carrying about half a 
mile, could apply the powder to one acre per diem. 
It appears from the foregoing that sulphur and lime 
applied at the critical period, when the germinating 
spores of Heillileia are threatening to denude ti e trees 
laden with crop, prevent the fall of leaf to 11 certain 
extent, and for a short time by destroying spores and 
germinal lulu--, and that no harm accrues to the coffee 
from the after products ; but it must also be pointed 
out that either from the action of the lime alone, or 
from salts of sulphur ami lime as well, a distinct 
benefit to tin' trees is obtained as the results i>f tho 
absorption by the ivo!s of tho compounds dissolved in 
tho water in the soil. 
