The Salt Lake herald. [volume] (Salt Lake City [Utah]) 1870-1909, 1897-04-13

is used to cut fossils out Of rocks. also
TO plane off pieces of rock until every
characteristic of the surface becomes
visible. 1t is capable of cutting a slab
of rock in sections of one foot square
and 1-100th of an inch thick, probably
the most remarkable rock cutting in
the world. This machine is called a
petronome. There will be numerous
examples of work done on il by the fe-
male students of Vassar. In the pale
ontological section, the exhibit of fos-
sill bearing rocks will be large, nearly
all the forms having been discovered
within the year Most interesting are
the specimens from the upper co;e
measures of Kansas, limestone and
quartzite from the lower, middle and
upper Cambrian in New York and
some corbaniferous rocks and fossils
from Nebraska.
III may not be known to the general
public that the process of sand blasting
occurs in nature as we'll as by human
agency. In the geological section will
be exhibited limestone pebble which
has been alternately scratched and poll
ished by the drifting sand of the des-
ert Wadi Amara, in Arabia. There
will also be snow gypsum pebble SIM
ilar1y scratched and from the same
place.
The process of mountain building In
nature will be shown in this depart
ment. Various substances OF different
densities have to be placed in what is
known as a compression chest for the
purpose of formation. The compression
chest is an apparatus for exerting a
downward pressure on substances
placed within it. The substances give
way in proportion to their densities or
hardness and the result is a fac smile
OF a mountain range. Beautiful fossil
ripple marks will show to the audience
the action of some prehistoric sea just
as We now can witness the more de-
structible markings in the sand of the
seashore. Perhaps the most attractive
exhibit of the lot will be the large
views of Greenland. glaciers taken b
the Cornell university Greenland expe-
dition last summer. One of the views
is a combination of six Ski pictures
taken from an elevation of 1,400 feet
above an ice-laden ford. The land
contact and the sea front of the gla-
cier is shown distinctly. A character
istic nunatak, Mount Schurman, rSies
above the ice in the middle of the pic
ture at a distance of about ten miles
from the camera at an elevation of
2,400 feet. Over 60 miles of ice are in
cluded between the extreme left and
extreme right of the picture. There
will be three large albums of views TAX
petition, and a series of maps illustrat-
ing the recent progress of the United
States geological survey is important.
The part devoted to Yellowstone park
will be particularly interesting.
Nearly so new minerals will be on
exhibition in the neurological section
Some of them will be beautiful, without
doubt, but far more interesting win he
those containing little cells of cavities
in
stance there will be shown a white
topaz, in which is a cavity filed with
gas caught up during the cryStalliza-
ton of the mineral. A slice of quartz
from North Carolina contains a gas
bubble, bEt most wonderful of all in
the exhibition is a gas bubble which
constantly dashes about a little cavity
in a piece of New Hampshire quartz.
This bubble, about one micron Q-25,-
900 inch) in diameter. dashes from wall
to wall of the cavity, in restless mo-
ton, like a monad seeking to escape.
This motion must have continued dur
ing the ages which have elapsed since
the consolidation of the granite. These
are wonderful enough, but there are
many more quite as wonderful. Some
of the machinery for preparing miner
ais are worth a volume of description
in themselves.
Within the domain of archaeology
and ethnology may be found many in
teresting things. The study of the
lost races is not less absorbing than
the study of living people. In the list
we find such treasures as a chromo-
reproduction of the cele-
brated pre-Columbian Mexican manu-
script preserved in the Vatican library
in Rome published last summer by the
Duke of Loubat; photographs and plan
of a recently discovered Aztec temple
near Tepozthan. Mexico; archaeology
cal specimens illustrating recent dis
coveries at the ruins of Onitlan, Mex
leo; bead and feather work of ancient
Eskimo; Eskimo games from Smith
Sound; rock paintings from British
Columbia, and so through a long list.
The anatomical department will be
ably Illustrated by means of plaster
casts, microscoDical slides and forms
of various compositions representing
and showing the structure of the hui
man BODY. But perhaps this will not
be as interesting to the masses as the |
section, wherein the lat |
est DEVELOPMENT of the art will be |
SEEN Part of the exhibit will be his |
torfcal i character in order to illus
trate BIZ comparison the present great /
development. There will be a full line !
Of lenses, some of them over six inches !
IN diameter, ana some mere SDeckS or I
glasses, yet all required TO accomplish /
precisely the same work, the whole |
showing the difference in the ideas of /
experts as the art advances in age. The |
very latest that has been done in color /
will be illustrated in this |
department.
In the line of physics the most inter-
esting exhibit will be an apparatus for /
the strain in steel rails, both /
when a train is passing over them and /
when i is standing still upon them. |
This is another example of how delicate /
and sensitive our instruments of pre- !
cision are now made. But these are |
after all but a 1.-THE of what will be ex-
hibted. 1t will be, in fact, an immense /
example Of our recent scientific prog /
ress. The progress of science is the I
progress of the world in miniature, for
t is to science that we owe any modern +
greatness we may have acquired or had
thrust upon us.
GARDENS.
The wide. fair gardens, the rich. lush