The Kootenai herald. [volume] (Kootenai, Idaho) 1891-1904, 1896-07-25

mers VIII probably make Obscrvat ons
from Norway and Finien1. very likely
near Varange F'iord. al Vadso and vardo
In Finland. The eclipse tnel. viii 10
shorter than at Yezo The chances for a
clear sky are about the same at the sew
eral places.
Photographic Possibilities.
The advance in photography and inn
provements devised by Professor Todd in
the mechanism for photographing celes-
tial phenomena multiply the glimpse sew
eral hundred fold Professor Todd has
arranged a mechanism by which he can
connect as many telescopes and cameras
as he may please. and can control their
operations as Photographic apparatus.
He can load load the huge machine with
hundreds of plates so placed in a revolv-
ing barrel that as fast as an exposure is
made new plate comes into the focus
He expects to operate 30 telescopes and to
bring back 800 to 400. or possibly more,
photographs. He will make the photo
graphs of the corona and total eclipse for
pictorial purposes and to measure the in
tens'ty of the corona and the light in ev-
cry part.
Professor Todd took with him both re-
fiectng and retracting telescopes. The
largest is a rejecting telescope with a
Pinch speculum, which will form an
image Of the sun one and three-quarters
inches in diameter IS feet away.
The SUMS Halo.
The greatest interest in the expedition
centers in the photographs to be made of
the corona. the wonderfully beautiful
halo of sivery radiance which is wholly
different from what we call sunl' ght and
is only to be seen when the sun is IN
fc nj nd 81 90
that the most appreciative Of astronomers
has said that, while perhaps only an as
tronomer could understand the poss bill
ties of its significance, only a poet could
describe it's glory
1t is a luminous appendage of the sun.
a fiamentous brilliancy which, when the
dark shadow of the moon completely OBJ
scures the solar orb, bursts out in flashes
and scintllant waves beyond the dark
ened circle. 1t seems in some way to be
connected with the sun spots The spots
are most numerous about every II years
and are fewest about five years after
ward
When the spots are many the solar co
roma bursts out strongest in curving rays
at each end of the lateral diameter of the
lunar shadow, and there is little of the
peculiar radiance at the ends of the YER
| llCdl u dmelel w men the Spots are rev
est there is more brilliancy above and be
low, and comparatively little at the side:
of the shadow. The moon has nothing t
do with the corona.
Before leaving New York Professor
Todd said: 1--WE shall by means of the
spectroscope and polariscope test ant
analyze the radiance of the beautiful sill
very light that forms the corona and try
| to find out Just what ii is and whether i
is due to the radiation of solar energy
Aside from the interest taken in TIL.
| for the pure love of science, there is
practical side to it ALL Everything learn
ed about the sun increases our knowl
edge Of terrestrial meteorology, which pro
badly never VIII be a perfected science
until we know all about the SUM-.
If the weather should interfere Will
these carefully made plans of the party
1T will be greatly deplored by the Who'll
scientific world