176 
SECOND BOOK. 
Fibres of Wool as seen under 
Microscope. 
much more quickly than through others, so that, in 
making our choice of mate- 
rial, we must he guided 
by the climate in which we 
live. Thus, the natives 
of Greenland or Lapland 
clothe themselves in thick 
furs or heavy woollen cloth- 
ing, while the people of 
hot lands mostly wear thin 
garments of cotton. 
8. We should take care to have our clothing loose 
or porous, that the vapour from the sweat of the 
body may be able to pass 
away through it. For 
cn III MU fibs purpose loose wool- 
d) Vif len clothes are the best, 
especially if they are 
worn next to the skin. 
The wool not only sucks 
up the moisture, but, 
where the air is cool, it 
prevents the sweat dry- 
ing up so quickly as to 
chill the skin. 
9. In hot countries cot- 
ton clothing is very com- 
monly worn, because it is light and thin. It is also 
cheaper than wool, though it does not take up the 
(P 
© 
Section of Cotton Fibre and whole Fibres 
under the Microscope. 
