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feet ) from hig
h is high enoug h to a r rest t h e forwa r d mo
hill
whic
h e sand
of t
dune
generally called the
a continuous line of paling is e
about
fe
t long by
at the lower
a bout half thei r length
line being parallel to t
is deposited
interstices and coming to rest in
immediately behind the paling
r oaches the uppe r
of sand app
R
LAMA
h is i s done by t h e con struction of an a r t
and t
inches wid
l
l
l
h r
P
s
l
F
dd
l s
O
r
l
h
T he planks a
h e co a st
r tain po r tion b
a ce
TI ON O F
h water level
r al dune
litto
r
cted
s
ss
p
s
l
l
l
l d
l d
h
s
x
r e in sert
an inch apart
gainst this fence
ing forced t
soon as t
nd s of the planks
I L
O
r m an a r tificial
to fo
this pu
con sisting of planks
inch thick
and pointed
s
s
s
s
d
d into
r
the di
ction of t
hr ough the
comparatively qui
h e accumulation
ment
ficial
r pos
s
ground to
h e
sand
t air
th
y
L
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