DR. TYNDALL ON MOLECULAR INFLUENCES 
225 
Table I. (Continued.) 
Description of wood. 
Tulip-wood. 
From Brazil 
Camphor-wood. 
From China ... 
Olive-wood. 
From Leghorn 
Gaffle Deal. 
Ash. 
Green Ebony. 
From Jamaica 
Black Oak 
Apple-tree 
Parallel 
to fibre 
of wood. 
II. 
Perpendicular 
to fibre and 
parallel to lig- 
neous layers. 
28 
Cam-wood. 
An African dye-wood 
28 
28 
27 
27 
27 
11-0 
11-0 
11-0 
11-0 
Mean lUO 
9-0 
9-0 
8*0 
III. 
Perpendicular 
to fibre and 
to ligneous 
layers. 
11*5 
12*5 
12-5 
12*0 
Mean 12*1 
10*0 
10-0 
10-0 
Mean 8*6 
10*0 
11*0 
10*5 
Mean 10*5 
10 
9*5 
11-0 
11-0 
9*0 
11*0 
Mean 10*5 
27 
26 
26 
8*0 
7*0 
8*0 
8*0 
Mean 8*0 
10 
13*0 
13*0 
14*0 
13-5 
Mean 13*4 
Mean lO'O 
14-0 
12*0 
13-0 
Mean 13'2 
11 
11*5 
12- 5 
12*0 
13- 0 
11-5 
Mean 12*2 
9-0 
10-0 
10-0 
9*0 
Mean 9'4 
12*5 
15-0 
15*0 
15-0 
15-0 
Mean 15’0 
Description of wood. 
I. 
Parallel 
to fibre 
of wood. 
II. 
Perpendicular 
to fibre and 
parallel to lig- 
neous layers. 
Iron-wood. 
Sp. gr. 1*426 
Chestnut. 
Sycamore 
Spruce Fir 
Honduras Mahogany 
Brazil-wood. 
A red dye-wood, 
called also Per- 
nambuco 
Yew 
Elm. 
Plane-tree 
Portugal Laurel . 
Bullet-wood. 
From the Virgin 
Isles, West Indies 
9*5 
9*5 
10*2 
10*5 
Mean 10*2 
10*2 
10*0 
26 
Mean 10*1 
26 
25 
25 
25 
24 
24 
24 
24 
Spanish Mahogany 
Scotch Fir 
Laurel. 
24 
23 
22 
22 
III. 
Perpendicular 
to fibre and 
to ligneous 
layers. 
12*5 
12*0 
13*0 
12*0 
Mean 12*4 
12*0 
11*0 
Mean 11*5 
10*2 
11*0 
Mean 10*6 
11*8 
9*0 
12*0 
13*0 
11*5 
11*2 
Mean 11*9 
11*0 
10-0 
10*0 
10*0 
10-0 
10*5 
9*5 
Mean 10*0 
11*5 
10*0 
12*0 
12*5 
12*0 
Mean 12*2 
12*5 
10*0 
13*0 
14*5 
13*0 
14*0 
Mean 13*9 
12*0 
11*5 
12*0 
11*5 
12*0 
12*0 
11*0 
Mean 11*7 
12*5 
12*0 
15*0 
