The Miller press. [volume] (Miller, S.D.) 190?-current, 1922-05-18
Hsaplno Screened cuano for Tran sfsr to ma,o,ano.

very uniformly spaced, averaging near
ly three to the square yard, and not a
yard of ground within the outside
limits of the rookery Is ~unoccupied.
In form and arrangement the nests ap-
pear as heavy roiied-rim basins stuck
into the hillside.
The guanay well deserves its COM
mon name. It's gregarious habit, It's
choice Of the level places or more
gentle slopes for nesting grounds, and
Its custom Of remaining on the Is
lands a great part OF the time all com
bine to cause the formation of enor-
nous deposits Of guano. from which
there is little natural waste. In the
region where this bird Is most abun-
dant, about the Chinchas and fal-
lestas islands, the climate conditions
are most favorable to the preservation
OF the nitrates. 1t Is doubtful IL the
gunno Of the Chinchas and Ballestas
islands is ever wet from atmospheric
moisture. A pair OF guanays. with
their offspring, produce nearly $3.50
worth or guano per year.
How the Work 10 Done.
The guano workers are practically
all Peruvians of the ancient stock. and
many of them come down from the
mountains to engage In this work.
Often there are few In the camp who
can speak Spanish and the foreman
can communicative NTH tho ornpInyaaa
only by signs or through an interpre-
ter.
The extraction Of guano Is a very
simple process. Where the material
is comparatively recent, the only Inn
plements required are the pick and
the shovel, a screen and a few sacks.
The surface cake Is first broken up
and thrown Into small heaps. Where
several contractors have a concession
from the government covering the
same island, there Is much rivalry In
getting the best guano mounded, for
this Is the only recognized method Of
establishing a claim to a particular
field.
The guano Is subsequently pitched
through slanting wire screens to re-
nov the gravel. and then sacked for
embarkation by ~lanchas. which are
strongly constructed lighters In the
form Of rowboats, adapted for use In
the heavy swell liable to prevail about
the islands.
A very common method Of convey
ing the guano to the lighter Is by means
Of the andariyel, an aerial trolley con
sisting of two stout wire cables sus-
pended between a frame at the top Of
the island and some convenient rock
somewhat removed from the shore.
The boat Is rowed beneath the lower
part OF the cable to receive the guano,
lowered by pulleys and windlass. Both
ends OF the line being attached to
travelling pulleys. the sacks OF guano,
descending by gravity. draw the empty
sacks back. No power Is applied to
the windlass except to prevent the
too-rapld descent of the guano. When
the lancha is loaded 1t is rowed out
to the vessel. where the sacks are
hoisted into the hold.
A much more extensive equipment
Is found on the larger islands Of the
north. An American company, con-
tracing for the Peruvian exporters,
has laid lines Of track for conveying
the guano by tram-cars, and the screen
Ing Is done from trestles over a lower
track.
BY far the greatest portion Of the
guano that has been exported con-
Of the ancient deposits, called
.sminerar" guano. which In places
covered the islands to great depths.
This has been simply stripped away
until scarcely any Of the old re-
except some of the lowest
grades that scarcely justify exporta-
tion.
ID "a within the bounds Of possibility
thas ADDITIONAL deposits, buried be-
meath the surface. may yet be located,
Unless this be the case. the industry
4 permanently reduced TO the annual
deposits, which scarcely exceed the
deaands OF Peruvian agriculture IN
IL present condition. without provid-
lng cor the great future Developments
n land cultivation In that country
that must fellow sooner or later with
The adoption Of more elaborate syS-
TENS OF irrigation.
Though the important birds tMvt
N,ecn greatly reduced in numbers, AZ
Is reasonable 20 exp<cf ! suhstant'a'
'rerco~e under nsturnl condis'w's. =