STRUCTURE OF WOOD, &C. 
97 
aspect, whose temperature was tolerably uniform at 62 0 F. The Quantities of 
following are the results : water, &c. in 
wood. 
Wei 
ght. 
Species of Wood. 
1 
At the ac- 
customed 
state of hu- 
midity in 
the air. 
at 62 ° F. 
In 100 parts of wood 
Were found 
When dry. 
Seer wood. 
Water. 
Elm, the core 
Grammes. 
Grammes. 
Parts. 
Parts. 
1053 
11-55 
01*185 
8*815 
, the sap-wood. 
11 '99 
13*15 
9E197 
8*803 
Oak, seasoned, &: 'i 
fit for the > 
1370 
15*05 
91*030 
8*970 
joiner’s use. J 
felled Oth Sept. 
12*45 
1370 
90*667 
9*333 
Lime, seasoned 
TV 
7*80 
93-205 
6*795 
,when growing 
6’75 
7*30 
92*466 
7*534 
— , the root 
9-9*5 
10*80 
92*222 
7*778 
Elm, seasoned 
925 
10*80 
91-133 
8*867 
Italian poplar 
7*50 
8*00 
1 93*750 
6 250 
With a view to ascertain the habitual state of the dryness of 
woods in autumn, I carefully preserved these same shavings 
till the 3d of November, in a northern chamber, not inha- 
bited $ at which period its temperature bad stood for several 
days at 52 3 F. with little variation. I then weighed the 
shavings, and from their weight calculated the quantity of water 
contained in them. 
The following table, containing the results of all these ex- 
periments, displays, in a familiar and satisfactory manner, 
the customary state of the woods, in different seasons, in our 
climate. 
100 parts in weight of wood, cut into thin shavings 
and exposed to the air, contained water. 
Species of Woods. 
In summer, at a 
temperature of 
62° F. 
In autumn, at a 
temperature of 
52 ° F. 
[ In winter, at a 
temperature of 
45° F. 
Parts. 
Parts. 
Parts. 
Poplar 
6* 25 
11*35 
19*55 
Lime 
778 
1 1*74 
17*50 
Oak. , 
8*97 
12 46 
16*64 
Elm 
8*86 
1 1*12 
17*20 
Vol. XXXV.- 
-No. 162, 
H 
From 
