The evening times., 1898-07-09

room on the south front of the build
| ing and Is in charge of Prof oh Fitman
and F. M. Little. Of the Coast Survey Of
| flee. Here can be seen nearly all the in
struments used In coast and geodetic
surveying. To the general public the
means OF regulating the standard Of
weights and measures comes first. The
instruments used, for this purpose are
graduated to the finest degree; in fact. SO
finely are they adjusted that a mere rub
bling for the purpose of cleaning the in
side of one of the liquid measures or the
outside of one Of the standard weights
necessitates readjustment of the ca
pacity on the measure or weight. These
standards of weights. 1t was explained
by Mr.. Little. are fixed by the weight of
certain amount of distilled water at a
certain temperature.
Next in interest. especially to the sci
critic world. comes the instruments used
In the coast and geodetic surveys. Among
these are the theodolite. vertical circle.
computing machines. alidOdes, used in
sounding and gauging the rise and fall
of the tides. sextants. chronographs and
the heliotrope. used in flashing signals
from station to- station in making sur
veys.
OF more than ordinary interest is the
standard end comparator and the saxton
pyrometer. the firse being used for deter
mining exact lengths and the latter for
determining the co-efficients of expansion
in metals under ~the influence of heat.
An idea Of the exactness with which the
pyrometer will measure expansion may
be gained from the statement that by the
application of a single lighted match to
the center of bar of steel three feet
long through, magnifer. an apparent
expansion OF near one half inches may
be noticed. This apparent distance is.
Mr. Little explained, equal to about the
thickness Of a sheet Of gold fimsey.
In connection with the instruments are
number of maps and charts. showing
the nature of the work done by the Sur
vey Bureau.
The object of the exhibit is twofold.
First. to the visitors. to show the kind
of instruments used in coast surveying
and the result of the work; and. sec
ond. II is OF interest to the bureau to
have the public correctly informed as to
the character and scope of the work.
and also to give an idea of the magni-
tude and difficulty under which the re-
suits are obtained.
The Survey Bureau have also provided
a great deal of literature on the subject
Of coast and geOdetic surveying. which
Is distributed to the visitors to the ex-
hibit.
The Weather Bureau displays its mete-
geological Instruments. at work making
record Of the appropriate element of
weather. and typical records of espe
cialiy interesting phenomena are exhib-
ited. The Weather Bureau kite. which
has been W to the height of 1900 feet.
is also there. with many photographs
showing the manner of manipula ting it.
Photographs of clouds lightning. water
spouts. hailstones. and of the effect of
tornadoes and foods are Instructive.
The school teachers find much instruc-
ton in the charts OF weather conditions of
different parts of the country and the
maps and publications of the Weather
Bureau.
Prof Moore, the chief of the Weather
Bureau, has gone to much trouble and
expense in preparing this exhibit for the
Information of those engaged in educa-
tional work. and he is always ready to
encourage the teaching of the science of
meteorology in schools and to instruct
them in the practical results of the
Weather Bureau work.
The exhibit is in charge of A j. Henry
and F. ]. Randolph assists in explaining
the exhibit to visitors.
The exhibit of the United States Geo
logical Survey occupies two rooms. one
being devoted to geology. pure and SIM
pie. and the other to geography. The lat
ter exhibit. in Study Hall. No. l. is ex-
tensive, consisting of relief maps in coll
ors of the United States. Colorado Can
yon. Yosemite Valley Southern New
England, Mount Shasta. maps represent
ing in detail regions of the United States
of exceptional geographic interest and
photographs of picturesque and beauti-
full regions in the West.
The exhibit is in charge of Henry Gar
nett. chief geographer Of the National
Geographical Survey. assisted by John
Hudson. also of the survey and Misses
Alice Gannett. Sydoil Baker. Carl Garri-
son. Louise Connolly. Katherine Raber
and Clara Upton. teachers in the Wash
ington public schools
The exhibit of the Agricultural Depart
ment was in charge of Mr.. Dewey as
sistant botanist. The chief feature is a
large relief map of the United States
modelled on section OF a globe and col
ored to show the principal life zones
There are also a large number of maps
showing by their csioring the districts of
certain flower grasses. the different ami
mails. birds and the distribution of To-
Gusts, caterpillars and the destructive
insects. a number of charts illustrate
the growth of insects from the cocoon
The educational exhibit consists of a
series of fine photos Illustrating typical
educational institutions including wo-
men colleges, professional schools and
public schools. Photographs represent
the buildings. interior of class rooms,
laboratories, etc.
The exhibit of the photographic Office
consists of a large number of interest
ing charts Of foreign coats and ports. a
complete set of sailing directions of the
world and other works on navigation.
and relief maps of the Atlantic Ocean
and the Caribbean Sea. In the collection
special attention has been given to the
meDs Of Cuba. Hawaii and the Philip
pines. which are of the greatest interest
at the present moment. The work of the
Meteorological Division is well repre-
sented by its pilot charts of the North
Atlantic and North Pacific oceans. work
charts and kindred publications.