247 
“ Professor Harrison (British Guiana) said that they’’ 
“had given up the importation of rubber seeds from” 
“Ceylon and they now got them direct from Singapore.” 
‘ 4 Within the last few months he had imported 62,000 seeds ’ ’ 
“and had got nearly 82% germinating. These seeds cost” 
“on arrival about 1,2c. each. They were packed in dry ^ 
“charcoal in seed boxes and were sent by parcel post to 
“ensure quickest delivery. The plants when ready foi 
“delivery had cost altogether 2.58c. each. The last eon-^ 
“signment of Hevea brasiliensis seeds from Singapore 
“had already given a proportion of very nearly 86% 
1 < germinating in a total of about o0,000 seeds. 
These figures speak for themselves and go to show that 
proper packing and careful planting at the end of the 
iourney is all that "is necessary to ensure the entirely satis- 
factory export of Para Rubber seeds to other Tropical 
Colonies. 
T. Wilson Main. 
CORRESPONDENCE. 
Sungei Gadut. 
The Editor, 
Agricultural Bulletin, • 
Singapore. 1 
Dear Sir, 
I have read with interest Mr. Zernickow’s article on 
Tephrosia purpurea. Permit me to ask one question, and 
that is, has any one planted Tephrosia over say ‘-00 or dUO 
acres and left it growing for 5 years, lopping it twice a 
year. If so, may I ask what the cost has been to cut it out 
and cart away. My experience is that all such plants in- 
cluding Crotalaria do very nicely for a year or two but in 
the long run, over large areas, cause endless trouble and 
expense. Planted closelyun rows on hill sides, instead of 
contour drains, might be more advisable, as the saving in 
surface soil should more than compensate for cost of even- 
tual removal. Two rows between the lines of Rubber Trees 
are sufficient. I have found C rotiiloria planted in this man- 
ner quite satisfactory, weeding expenses being only slightly 
increased. So far as flats are concerned I believe in ab- 
solute clean weeding. 
Yours faithfully, 
X, 
