456 
AUSTRALIAN NATIVE PLANTS. 
TASMANIAN BLUE GUM (£. globulus). 
Experiments by Mr. James Mitchell. 
| 
(See p. 338.) 
oe E S 
w é | Value of Value of 
ee Name of Wood, etc. Specific | Elasticity. | Strength. 
Ze (1 to 15, each 7ft. long and 2in. square.) Gravity. = bw’ 3 lw 
has ~~ ad’ d 4ad? 
I Blue Gum, green piece, newly cut ... 1.027 | 6083932 1982 
2 + 5 33 eh 1.078 | 9845472 2100 
3 35 seasoned about 3 years 1.003 | 6022637 *1693 
4 us 43 ; 8 months 1.076 7260624 2149 
5 ” ” ” 1.034 13551368 2246 
6 Af » rom 2 to 3 years 1.054 13625285 2701 | 
7 ” ” » 4t95 5 1.078 11126670 2737 
8 9 ” » 2to3  ,, -987 12180824 2921 
9 = ae un 4 ROL mais 1.071 11692433 2921 
10 05 33, 3 Years: .. -942 14241872 2945 
II a > yellow coloured 1.018 8791776 2969 
12 5 + brown a5 -997 15478693 2992 
13 9 >» curly gum 1.005 | 16426368 3242 
14 we + brown coloured 1.008 14908785 3365 
15 9 1.089 13955485 3491 
Separate Experiment — 
16 Piece of keel from a steamer sft. long | 
rZin. square se oes ae a 1.090 | —- 2213 
Weight reduced to 7ft. long and 2in. sq. — — 2210 
* Contained much sap-wood. 
TRANSVERSE EXPERIMENTS. 
(Lasleit.) See page 342. 
Pieces 7ft. long by 2in. square. Weight suspended in the middle; 
both ends free. 
Bf BOSS “ e ls sg 
) ee) = ‘ ; & 9 
rs) . m5 0 2 feces 0 eh 
No. of ote z sia) ) gee = ZS 2| sao 
Vvsa oO ray a Bs che= Sh ars Ua o 0 & 
He | a | eee | eee 5 |e 4) 3 2 ee 
eae: Ssh P | PE) Sas Bic = vo SO eS ier 
Specimen.| = © .5 yes 2» v Ae o Dog ms a 
BEG|2ee)/s°S) ee oe 
<5 Bs 7 v 1D Pie S ) 
S 
Inches. | Inches Inches. Lbs. Lbs. 
: 1.25 +15 4.50 964 1079 411 191.75 
a 1.75 +20 3-95 602 997 604 150.50 
1.35 -10 5.75 410 1037 684 177.50 
3 1.00 +00 3-75 464 1108 692 191.95 
4 1.25 ant 3:50 684 1026 666 171.00 
3 1.00 .00 4.00 441 92 Sox 185.25 
Average 1.26 +10 4.21 412 1029 603 177.96 
Each piece broke with a short fracture. 
