The Chickasha daily express. (Chickasha, Indian Territory [Okla.]) 1899-current, 1901-04-26

70 tile surface So the Terkes object
glass weighing 20 pounds was CONE
nnenced by 81. Mant0is in 1887. and was
only completed IN 1889 IN time 10 be
shown al the Paris exposition Of that
year
one Of the Two hints of the Grande
I.unette is already quite finished. It
weighs 80 pounds and cost $4,000, Each
Of the object glass crowns win weigh zoo
pounds. These disks together have $50
O0o worth Of glass IN them. Polished,
they viii b. worth $4,000.
The polishing Of the great mirror could
not be accomplished by hand in the old
way Without entering into the details
Of the newly contrived polishing machin-
cry. h. may be said that the disk q sup
ported by a moving steel table. Above II
bangs a moving p0lisher The table re-
wolves slowly. The Dolisher moves back
ward and 40Tw aTd Slowly. But the polish
er itself must never come in contact with
the glass A mixture Of water and emery
powder is always between them. As the
mirror fattens the more perfectly. the
finer IS the emery powder and the less
Of Il mixed with the water until the
polishing is done alone with distilled
water. AT the last account. after seven
months of incessant movement. the pol
isher was within one-hftieth Of a miili-
meter OF the surface Of the glass When
the polishing Is done the mirror win be
rubbed dry with Venice tgipoh, for three
months longer.
At the beginning of the work lhere were
many surprises and il was not until after
a long series Of timid experiments that
the exact distance between the poiishei
and the mirror for each nneness of emery
powder was determined. The whole morn
ms OF each day is occupied in cleaning
and adjusting the polishing machine. The
polishing itself being only done from .
10 p. r.. when the Temperature scarcely
changes. A twenty-hfth ef a degree o.
change affects the work
IL Is the moon and the planet Mars thai
win be most observed through the Grands
Lunette BY the visitors TO the exposition
OF 1900 All through tine summer Of the
exposition year the grounds will be al
most as bright and gay by night as hs
day. The corporation that Is putting uT
the telescope Is spending over 2O00.OR
francs upO nit The admission nrice-tt
hunt for elephants upon the surface OF
the moon-will be extremely high
Thanks TO the horizontal position Of th'
instrument. the image 0f tho planet car
be- thrown by a magic lantern process OF
gigantic screen. so that a thOnsaul
people may see it al the same time sucl
views will be the cheapest and pcrhap
not the least satisfactory. The grea
shall we see?
IL Is said that the moon will give at III
focus Of the Grande Lunette am image o
23.4 inches IN diameter Up 10 the presen
the greatest enlargement Of local image
have been 1000 times. with the Gram
Lunette they may. under certain cir
cumstances, be enlarged 10000 times
This viii be as II the picture of the mooi
thrown on "a screon-could any screen b
large enough should stretch out 23f.0
inches, or almost -four miles ia diameter
No one. OF course. will see "the moon
but only moon landscape.
How close win 1t bring the moon TO "a
earths Some say within forty miles
Others say within "a few miles N
Nandevyvcr OF BRUSSELS has put himsel
on record with the promise that We sha
be brought near enough 70 view the eve
lutions Of lunar army corps o. fleet.
will. therefore be a pity If there are n
array corps or fleets upon the moon