Weekly Chillicothe crisis. (Chillicothe, Livingston Co., Mo.) 1878-19??, 1880-10-21
POPULAR SCIENCE.

tric railway system IN II. G0thiuu tul-
mel is contemplated
The number of optic nerve tibers is
43S,0O0, and of retinal cones in each
human eye, 3,36O,OOO.
Recent experiments by Piazzoli ap-
pear to establish the fact that the te-
nacity of iron increases on magnctiza-
tion.
1t has Just been shown that an alloy
of lead and rhodium has the curious
property of exploding on exposure to
! heat
1t has been decided that the proposed
Trans-Sahara railway shall be preceded
by the construction of a telegraph line
connecting Algiers with st. Louis, in
Senegal, via Timbuctoo.
After a prolonged observation NJ.
Montigny finds that very vivid scin-
tillation of the stars indicates agitation
or fall of temperature in the upper
regions of the air, and consequently the
approach Of bad weather.
1t is claimed that Professor Baeyer's
method of producing artificial indigo
has at length been found to he com
mcrcially practicable. The indigo is
obtained from isatine chloride, which
in turn is made from benzol.
The change Of color which is occa'
sionally observed in the pureSt carbolic
acid is aScribcd 10 the absorption of
ammonia, or, rather, Of ammonia nitrite,
from the atmosphere. In glass vessels,
Theoretically sealed, no reddening OF
the acid takes place.
Gustav Engcl has experimental upon
animal and vegetable substance to as
certain the principles involved in dye
ing. All the experiments agreed in
proving that the facility with which
substances absorb and retain dyes de-
pcnds almost entirely upon physical
structure, and especially upon capillari-
| ty.
| An examination OF earth that had
become saturated with coal-gas has
been made by DR.. L. Koengs. He
worked up samples Of the soil into a
paste acidulatcd with sulphuric acid.
and passed current of steam INTO the
mixture. The gases and vapOr given
off were collected in glass receivers, 1t
was found that the bulk of the product
consisted Of naphthalin, and that there
was no trace of calbolir acid.
Wli1o Nun,,ico is 9, Greatly distiu-
orisIoL In, its ir,orti,rs and remark
9IJn nn.rrniscs thnrr is murh to indi-
r,tn th,t i will t,l;n an nnually hiph
,9nl, in thn roaln nr discoveries and if
may also he predicted with a reason
able degree Of certainty that astrono-
my will eventually find its highest
advancement at the hands of Ameri-
can investigators and that Il goodly
portion of this work may he expected
from the new Warner Observatory at
Rochester.
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tn,nr v,iII Il. .r,,rpcI with fine LATEST
appliances for thoroughly sweeping
the heavens in every direction.
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VIII oc It no'c 'o'i' 'oo"' '"o '''''''' III
o'''''c'ei'
At a time when all are noting the
remarkable development of this cotm-
try, it is cause for congratulation that
the literary and scientific institutions
of the land are keeping pace with its
material growth. This truth is being
confined every day, and the erection of
the new Astronomical Observatory at
Rochester, n. V. is most important
step in this direction. Prof. Swift,
who has become known throughout the
world as the fortunate discoverer of
so many comets,'has labored under great
disadvantages i'm his work owing to a
lack of proper facilities. The new OBJ
servatorv will entirely overcome these
troubles, ms the telescope which is to
he mounted in its dome is the third
l,roest i'm size of any i'm America. But