S T R
47S
S T R
■ted od
Kind of Wood, and specific■ gravity.
Oak .
Ditto, dry t from .
Beech .72
Do.
Do.
Alder.
Sycamore.69
Do. .61
*■» - { T :::::::::::::::
Do.
Elm .69
Do.
Mahogany.87
Do.
Walnut.
Do.69
Teak.
Do. old.63
Poplar .36
! “T::::::::::::::::::
Norway Pine .66
Petersburg Do.49
F,r 1 to .
Do.
Pitch Pine.
Norway Pine .
Do.57
Cohesion of a SquareInch in pounds.
19.800
17.300
12,000
8,889
22,000
17,709
11.50014,18613,000
13.300
10.50017,850 )15,784 J12,00014,40013,489
21.8008,0008,1307,800
15,0008,2007,2006,641 )4,596 S
14.300
13.30013,448111,000 f
8,506
7,818
7,287
10,220
8,900
Experimentalist.
V
Jc
o
<£
,c
V
01 .s %
mM
Bevan.
KIND OF WOOD.
fS
&
C
e
£ c
Muschenbroek.
£
£
_ O)
3 5
Barlow.
Bevan.
Muschenbroek.
Barlow.
V
Vp<
09
a
0)
rt
V
w
p.
ft
£
Go
.863
2
l
i
1.87
Muschenbroek.
Do., medium quality.
.748
2.5
i
1
Bevan.
Do, green .
.763
2.5
i
i
Rondelet.
Beech, medium quality ...
.690
2 5
i
i
Bevan.
Alder ...
.555
2.5
i
i
Barlow.
Plane tree.
.648
2.5
i
i
Chesnut, green.
.875
2.5
i
i
Muschenbroek.
Ash .
.753
2.5
i
i
2.38
Bevan.
Muschenbroek.
Elm, common.
.544
2.5
i
i
Bevan.
soned .
.853
2.5
i
i
Barlow.
.560
2.5
i
i
Muschenbroek.
Walnut, green.
.920
2.5
i
i
Bevan.
Poplar, Lombardy.
.374
25
i
i
4.00
Barlow.
Teak.
.744
7
2
2
Bevan.
Willow.
.405
2.5
1
1
3
Bevan.
Birch .
.720
25
1
1
Riga Fir .
.480
2.5
1
1
1. 3
Bevan.
Memel Fir .
Norway Fir, from Long
.553
2.5
1
1
1.15
Bevan.
Sound .
.639
2
1
1
1.12a
Barlow.
.529
2.5
1
1
1.75
Christiana White Deal ...
.512
2
1
1
.937
Muschenbroek.
Spruce Fir, British growth
.555
2.5
1
1
Muschenbroek.
.622
25
1
1
Rondelet.
Red Pine.
. 54
4
3
3
Rondelet.
Bevan.
Yellow Fine.
.439
4
3
3
Table showing the Modulus of Elasticity of Beams pressedin the direction of their Length.
Beech .
Alder .
Chesnut, green .
Ash .
Elm.
Acacia.
Teak .
Riga Fir .
Memel Fir .
Norway Spruce Fir ...
Weymouth Pine.
Modulus of Elasticityin pounds.
1.714.5001,316,0001,086,750
924,570
1.525.5001,343,000
1.687.500
1.255.5001,593,0002,167,074
486,000
1.687.5001,957,7501,804,000
1.633.500
1.363.500
Autli° rl
■jtie*’
“A'S P* !
~482
284 F.bbe s -
2'9 Et *t
271 EbW »•243 Ebbe£
S10 Ebbel*
SS-js?
820
Ebbs' 6 ',Tredo 0
Tredfftrredg° ](iEbbd 3 '.rredg»'“’
uncld* 01 '
146
207
212
218
396233343180223 T
3780 12753 1
Experiments on the Strength of Beams supf orxone end.
ted at
Besult of Experiments by George Bennie, Esq.
Base 1 inch square, length 1 inch of Elm was crushed by 1,284 pounds
„ length 4 inches
3 inches „ „ 6 to 9 in.
= 6,720 pounds per square inch.*
* This is the mean of two experiments made by Mr. A. H. Renton,wit!) Bramah’s press.
KIND OF WOOD.
Specific gravity.
Length in feet.
Breadth in inches.
Depth in inches.
.922
4
2
2
Dantzic Oak .
.854
4
2
2
Beech .
.700
3
2
2
Ash .
.730
2
1
2
Teak, old, dry.
.606
5
2
2
Virginian Yellow Pine ...
\522
5
2
2
.618
5
2
2
Pitch Pine .
4
2
2
Larch, dry .
.526
5
2
2
Red Pine.
.544
2
3
3
.537
4
2
2
11
6
IS*
Ilf
pea"' 1Ideb”,J?arl°' ‘Id eta-Id eC, >d
Id®?*,.
o-tll ° a ■ W
The following remarks respecting the ^Sl^perito^ puli 11 'wrought iron, with the various Tables c on
extracted principally from the elaborate w j(j tf ^Bridges, by Mr. Edwin Clark, to which we _ s ubj e ^| 9 inreader for much valuable information on ^ jpab' 1 ' tl> efurther list, showing the strength . var ^! a ine^general use, will be found useful ; it is 0same source.