The tropical ageiculturist. [july i, 1899. 
Table VI.— CO-EFFICIENT OF ELASTICITY FROM BENDING TESTS. 
Range of Stress. 
Elastic 
deflection. 
No. 
Name. 
Locality, 
Pounds per 
per 100 pou 
square in. 
load in inc 
1(a) 
Sapu 
Ceylon 
0 to 
7,551 
0-0146 
1 (b) 
(io 
0 to 
8,078 
0-0145 
2(a) 
Pan ah Ka 
do 
0 to 12,690 
0-0 102 
2(6) 
do 
0 to l.S,2.W 
0-0171 
3(a) 
Gurukina 
do 
0 to 10,800 
0-01 GO 
3(6) 
M • • 
do 
0 to 
6,673 
0-0174 
4(«) 
Vuinauku 
do 
0 to 
0,596 
0 0254 
4(6) 
j» ■ • 
do 
0 to 
9,432 
0- 0-262 
5(a) 
Satinwood 
do 
0 to 12,630 
0-0173 
5(6) 
<> 
do 
0 to 14,y.30 
00144 
6(a) 
Milla .. 
do 
0 to 14,710 
0-0155 
6(6) 
>i • • 
do 
0 to 14,810 
00152 
7 
Hauthai . . 
do 
0 to 
3,000 
00166 
8 
Mandora 
do 
0 to 
6,000 
0 0084 
9 
Ubberiya. . 
do 
0 to 
4,000 
0-0099 
10 
Jawenna 
do 
0 to 
3,000 
0-0089 
11 
Dawata .. 
do 
0 to 
3,.500 
00126 
12 
Margosa. . 
do 
0 to 
4,000 
0-0142 
13 
Lunumidella 
do 
0 to 
1,500 
0 0218 
14 
Walukina 
do 
0 to 
2,500 
0-0100 
15 
Kanai 
do 
0 to 
3,500 
0-0155 
16 
Chomunti 
• • 
do 
0 to 
5,000 
0-0100 
17 
Suriya .. 
do 
0 to 
4,000 
0 0159 
18 
J ak 
do 
0 to 
3,000 
0 0160 
19 
Del 
do 
0 to 
4,500 
0 0111 
20 
Hal mill a 
do 
0 to 
5,000 
0-0109 
21 
Suriya Mara 
do 
0 to 
5.500 
0-0095 
22 
Nedun .. 
do 
0 to 
5,000 
0-0090 
Co efficient of 
Elasticity, 
square in. square in. 
1,1-26,000 
1.125,000 
1,519,000 
1,431,000 
1,. '14-2,000 
1 ,403,000 
961,600 
967,200 
1,419,000 
1,712 000 
1,592.000 
1,639,000 
9.55,900 
1,872,000 
1,596,000 
1,783,000 
1,257, 00 j 
1,109,000 
739,000 
1,646,000 
l,0-28,0"0 
1,651,000 
1,014,000 
995,600 
1,418,000 
1,749,000 
1,736,000 
2,180,000 
502 3 
502-0 
678-1 
6.38-6 
688-2 
6-25 9 
429 2 
431-7 
633 6 
764 3 
710-8 
731 4 
426-7 
835-4 
712-5 
796 0 
561-3 
495-0 
330 I 
734-7 
459-0 
737-2 
452-6 
444-4 
6:^2 8 
780-7 
775-0 
972 9 
TIMBER SEASONING BY ELECTRI- 
CITY. 
We extract the following from the Engineer: — 
During the last few years considerable atten- 
tion has been given to the invention of new 
processe.s for treating timber. The latest aspir- 
ant to fame is a process and apparatus which 
claims to give to timber properties which time 
alone has so far been able to produce. It is a 
French idea, and has, we are informed, met 
with considerable success in Paris, where works 
liave been established to treat timber on a large 
scale. The Nodon Bretonneau process involves the 
expulsion of the sap and its replacement by a 
solid matter, insoluble and aseptic. This is 
ellected by placing the material to be treated in 
a vat containing a lukewarm solution made up 
of borax, 10 per cent.; resin 5 per cent; and 
•75 per cent, of carbonate of soda. W^hile in 
this bath, and electric current of about 100 volts 
))ressure is caused to pass through the timber. 
The currents sets up what is termed lectro- 
capillary attraction, au^ drives out the p by 
the introduction of the solution. This treat- 
ment lasts from six to eight hours generally, 
after which tlie wood is subjected to a further 
treatment of a few hours' duration in a warm 
bath to allow of thorough permeation of the 
entire section. It is then removed and dried 
under cover by air currents, a process which is 
said to take from fourteen days to a couple of 
months, according to the density and thickness 
of the material. The inventors claim that not 
only is a considerable saving in time and ex- 
pense in the drying of timber effected by this 
process, but that certain cla.^ses of wood, such 
as maritime pine, which have not hitherto been 
readily saleable owing to the large amount of 
moisture they contain, can by its use be read- 
ily deprived of the sap. The expenditure of 
electric current is said to be 600 watts 1 er cubic 
metre per liour for five hours. The Electric Tim- 
ber Seasoning Company, Victoria-street, West- 
minister, is introducing the system into this 
country, and a model apparatus has been fitted 
up at the work of Messrs. Johnson and Phil, 
lips, Charlton Junction. 
