412 
expansion due to the absorption of moisture from the atmo- 
sphere during damp weather. 
In order to further investigate the relation between the 
expansion of the wood and its moisture contents two small 
diameters, parallel and perpendicular to the rings, and 
weighed. They were then kept. immersed in water for two 
ae | 
` FI: 
x 
era 
4E 
b 
4H 
W 
E. Piz 
z 
DF. 
PI 
E 
qe 
ite 
Ew 
4 MOISTURE, ON , DRY WOOD. , , . 5 
O 40 s 
20 
Fig. 3. 
Showing contraction of wood on drying after immersion in water. 
P.M. refers Pinus maritima, P.I. refers to Pinus insignis. 
.C. refers to Pinus. canariensis. 1 
The suffix 1 indicates the curves showing contraction paralle 
: the rings. ; 
The suffix 2 indicates the curves showing contraction perpendicular 
to the rings. ; 
days, after which they were removed and again weighed and 
measured. It was found that the moisture contents of the 
Ansignis blocks now amounted to over 150 per cent. of the dry 
Weight of the wood. maritima blocks did not absorb 
60 80 . 100 20 MO Xe 
