Evening star., 1921-08-21
Continued. from First Page.)

division of the survey. Mr.. Fischer.
OF instruments were turned out for
the Army and Navy during the late
war, In the machine shop skilled
workmen. fashion the delicate and
accurate Instruments needed by the
Survey To the right of this is the
are built and repaired. The rods
used for the SURVEY have a metal
center strip composed of 'inyar."
combination of steel and nickel. upon
that Is, as far as surveying Is con-
cerned. For long time it was inn
possible to secure a lamp that could
be seen at a great distance. but Mr..
Fischer designed one that threw a
beam of light in the manner desired.
THE thousands of maps that are
sold to mariners are the result
of many heartbreaking hours Of la
Dor, likewise the|maps used on land.
and after the craftsmen had drawn
the original on velium it must then
go to the plant where iithoeraphy
and printing take up the work. The
larger maps are photographed in
four plates and. after these have
been gone over by skilled artisans.
they are then transferred to aliumi-
mum, plates. Great; care Is taken
that the plate will receive every out
line, dot and cross. just as l. shom q
appear. After this work is done the
plate is placed on A-whiriing deVlcs
to eliminate all foreign matter. II
then goes into a large boz. upon
which are shed the rays OF two pow
erful electric lamps.
It is then turned over to the men
who prepare the plates. and alter
passing several hours under the
manipulation of the exnert hnF'r
IT goes to the press and the map
dried and carried to the storeroom.
ready to be dispatched to dinereht
parts of the country:
The printing division is under the
direction Of D. P. Barnett. Back
once more to the new building. ing
Of which was. $4,000. Here each
original map Is placed in tin cNlin-
der and numbered so that If 1t Is
needed it can be secured without de-
lay.t This vault may be hreproof. but
in the Judgment of the writer 1t
reinforce it. more especially as It
would take about a billion dollars and
40 end of time to replace the con-
tents of the vault as 1t stands today.
sexen il it could be done at all. Again
we twist, turn and climb innumerabie
stairs until We arrive at the photo
graphic section. presided over by that
wizard of the lens. Mr.. l. p. Keyser.
This division is located up in the
garret Of the hotel building. The
natural light is not sufficient for any
practical purposes and artificial lights
have to be used all the time. There
are iron trusses projecting this way
and that, splendid things on which to
bump ones head. The ventilation
here is practically nil. and yet. despite
these handfcaps. Mr.. Keyser and his
assistants turn out about $500 mega
tives year. to say nothing Of the
80. 900 or SO photostats that are called
for each twelve months. Back once
more to Mr.. Fischers department, to
see the best sounding device in the
world.
Up until q short time ago. the ma
3ority Of sounding tubes used in this
country came from England, but a
careful study made of these disclosed
the fact that they were not accurate,
and this. coupled with the knowledge
that they could be used but once,
caused the survey people to devise an
Instrument that-was absolutely accu-
rate and could beused for month after
month. Two very interesting MEM
Rers Of Col. Jones cabinet. for there
Is cabinet ehatssits every day or two
and talks over matters with him, are
Capts. Wainwright and McGrath. the
former cotning TO the service in 1870
and the latter in 1878. Despite the
fact that Capt. Wainwright had re-
tired. he came back for service during
the war, and is still rendering valua-
BILE aid to the ssFyice he loves SO
Een. Mr.. McGrath is hale and hearty
and as loyal as ever The survey is
4Nke one big family, and Mr.. Griffin,
who presides' over. the financial Sec
tfon, has arranged matters so that no
man, while out in the field, is ever
delayed by reason Of funds not reach