Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1916-08-20

fall on the Mirror converge to the focal point which
In this instance is at the end OF tube. The
Photographic pate-indispensable aid to modern as
tronomy-may be placed in the axis Of tube or at
one side, where 1t records image after reflection
Several arrangements possible
professor Hale gave this outline of the work that
About 5000 stars visible to the unaided eve
on clear night In the entire sky. Recent estimates
by astronomers that stars brighter than
reflector, now In operation. 1t seems reasonable to
hope that a 1ooinch reflector will add nearly 100,
You'd the limits Of the universe as It is now known
"lnnumerable stellar problems confront u.s. We must
learn beyond doubt whether light scattered In space
and If SO to what extent
The closely allied question of the relation of stars
redness to its physical constitution the greatest i'm
portance from the standpoint OF evolution, must also
be cleared up.
Another capital problem is the actual extent Of the
TWO Star1streams discovered by Kapteyn This astrono
mer found by measuring the movements of a large
number OF stars. that there really two systems
of stars-hat they moving in such directions that
the streams ntersec and that this intersection Is In
the vicinity Of the Milky Way Our observatory is CO.
operating closely possible with Kapteyn In gain.
ins further information regarding these starstreams
The increased light gathering power Of the 1OOinch
reflector should help greatly to reveal the extent
these streams.
Many OF the most valuable data to be obtained from
the use OF telescope comes from its in
ton with the spectroscope and with laboratory
appliances. At the Mount Wilson laboratory efforts
are made to reproduce heavenly phenomena expert
mentally. For example in sunspot spectra many thou
sand lines shown; hundreds of these correspond
in position with iron lines but they the
in electric furnace to different temperatures lines
similar in relative intensity to those shown in sunspot
spectra were produced.
1T thus determined that sunspots are actually
regions OF reduced solar temperatures; and that
temperatures such that chemical compounds can
be formed. Some of the compounds, such as mag.
nesium and calcium hydrdes and titanium oxide have
been identified in Slnspot spectra. 1t also found
long ago. and more recently confirmed, with the aid
of the acknowledgement, that the gaseous sun does
not rotate like the solid earth but that the
the poles move more slowly than those near the
equator. If similar condition existed the earth
Los Angeles would farther eastward Of San Fran
cisco every day.
90 In hye years we have taken photographs, with the
60inch reflector. Of many star clusters One OF these
has 10000 stars. The study Of these star clusters
fruitful subject for research.
"Nebulae offer another subject Of great interest
These on a scale incomparably greater than our
solar system. which. from the same distance
nebulae are of peculiar interest and the l00inch
fector should be of service in their study
Professor Spher has found that nebular
spectra indicate rOtational movement and Adams and
Pease have extended this work and have made accN
rate determinations Of the velocity Of rotation In
tain spiras.
"a matter OF prime importance is the determination
of the magnitude Of the universe Each larger tele
scope reaches farther and farther into space On the
assumption that stars scattered evenly, ap-
powerful telescope would reveal number Of stars
in proportion to its added power AS matter OF
fact toward the outer boundaries of stellar system
the increase in the number of such crcum
The Gigantic 10o.Inch Lens of the Mount Wilson
Telescope in Place the Grinding Table.
This Shows the Size of the Huge Block of
Glass When in Process of Grinding