98 
taken at 5 feet 6 inches from the ground, of 225 of these trees, 
was 2 feet 4} inches. The figures already given for the average 
weekly yields represent the mean results of the tapping of 
the mean girth of the whole periere From Six — e 
. per was 
obtained. This represents a yield of 97 lb. per acre 2s 300 trees 
(12 feet apart). If the trees tapped had been of the s mean 
girth as the whole plantation, the yield would probably } fuso been 
at the rate of about 120 Ib. per aere. Further, only six tappings 
were made, and the trees, after a rest of a few months, would 
probably have stood three or four more poids whose yield 
might have been at the rate of 30 or 40 Ib. per acre 
e No record, Mein el was kept of the aie when this 
e X 
tenth year. This estimate is, however, liable to modification by 
the results of experiments which are still i in progress 
Cost of opening Plantations. — The fol aind estimate of the 
first year's cost of opening a plantation of 300 acres of forest land 
with rubber was am by Mr. F. Lewis, Assistant Conservator 
of Fores Colom 
Rs. 
Felling and clearing at - 12 per acre.. ass — UU 
Lining, 10 ft. by 10 ft., at Rs. 2 per acre. "e vem 600 
Holing, at 75 holes per cooly at 40 cents 697 
Filling and planting and carrying Ungua from their 
nursery to hol es, 300 per cooly at 175 
Draining—300 ft. of drains per acre pns 1 cent per 
foct run 900 
Lines for coolies—1 ‘shed of 10 rooms of 12 ft. by 
10 ft., mud walls, and battocalla roof, at Rs. 30 per 
(d. s 300 
Roads for inspection, 2 miles aes ped tbe 160 
Plant nursery, including watering is ioe prea 150 
Weeding, at Re. 1 per acre per month .. Ye scs. MOD 
Cost of surveying lines round plantation, 15 
Contingencies, such as special work, » bridges over 
ig or supplying vacancies, &c. 250 
Salary of assistant eh dos sed eee 1,000 
Jue cooly e oe as T i Hi 120 
Tola eis vis wx 921 
* This represents an average of Rs. 40 per acre. A return umn of 
Rs. 4,200 is estimated to be obtained by the sale of timber and 
firew wood fro m the land cleared, "This should suffice to erect the 
Assistant's bungalow and leave a small xe for LEOIN 
“ To this estimate priv. te planters must adå the cost of land 
and of seed Coat Rs. 20 per 1000). These items will probably 
