The Dallas daily herald. [volume] (Dallas, Tex.) 1873-1887, 1881-10-23
SCIENTIFIC.

1t rs said, on the authority Of NJ. Ferrier,
that the yield of tin at Billion is now much
greater than in the neighboring island of
Banca.
1t Is reported that Pasteur is to visit Bor-
deaux, to study yellow fever in the laza-
retto in order to find out whether inocula-
tlon will afford protection against the dis
ease.
Near Cambridge, England, the portion of
the letter-boNes surrounding the apettures
has been treated with luminous paint TO
enable the people to see to post their letters
after dark
According to NJ Dieuafait the b ric
acid existing in sedimentary dcposits
always associated with saline substance. is
derived from the spontaneous evaporation
at ordinary temperatures of the waters of
ancient seas
On Sunday, September 18th, at Kinsussie,
Scotland, several persons observed a pink
rainbow just over Glen Feshy. The bow
was shaded from crimson to pale pink, but
there was no other color. Not one of the
party had noticed similar phenomenon
before.
.Quinic acid, says Les Mondes, is n new
heterogeneous compound yielded by quinine
IN place of chichonic acid. This new sub
stance is only slightly soluble in water,
even when the temperature of the latter is
raised TO one hundred degrees Its salts
crystalline readily, and when heated they
eve on a peculiar, pleasant, aromatic odor
IKE that OF coumarinc, which occurs partly
in crystalliaed form in Tonka beans
With any ink usually employed in wri.
tlng, reduced from ten volumes to six, and
TO which four volumes of glyCerine have nf.
terward been added, Professor AtttieId has
been able to obtain transcripts Of manu-.
scripts in an ordinary thin paper copying
book without the use of press. When a
sheet of paper is written over with this ink,
i Is placed under one Of the sheets of the
huoH, and then a price of blotting paper
lad over the thin paper takes up, when
pressed IN the common way, any excess of
INK which may come through.
Ten years ago a blast furnace which
would make 400 tons of metal per week on
600 tons Of fuel was considered IA big thing
We have blast furnaces ii Pittsburg which
produce 800 tons ofmetal per week on less
than 100 tons of fuel. The old method of
heating permitted the flame to pass out Of
the furnace stack at temperature o.. 5000
degrees Fahrenheit. We are now using the
regenerating stoves in Pittsburgh, and do
not let the gases out until we have utilized
An object of great attraction in the Chi
cago exhibition is brlck-making machine.
By an ingenious process, so simple MS TO he
almost ridiculous, 10000 brick is made
every day, 1t is of that class known as the
tempered clay machines. IL tempers the
clay which it uses by water, and forms il
into parallel bar of the proper width and
thickness, sands the surface, cuts il into the
proper length, and, by an endless belt. de.
liyers the brick stiff and almost dry, at any
convenient distanceirom the machine. The
cutting is done by spiral blade of steel.
A mixture of finely divided sulphur aud
q solution of lead suiphatc, when boiled
sets free the sulphu.iC acid, and deposits
lead sulphike, which might have been an
ticipated, NM. T.. Filhol and Senderens
maintain, on the principles first formulated
by NJ Berthelot. Pursuing their research.
es, these chemists find that silver carbon.
ate, oXalate, nitrate, and acetate may also
be similarly decomposed, but lead sulphato
Is only decomposed very slowly, leaving
the everything liquid not perceptibly acid.
Silver chloride and copper sulphate, nitrate.
and chloride have not as yet been thus de.
composed.
The Nature says that not less than ten
observers are now engaged Mt the obserya.
tory of Paris in the completion of the cata-
logue Of stars which was begun by Lever.
rier. The work is progressing at an unprc.
ccdentod rate, not less than seventy thou.
sand observations having been tabulated.
after having been duly reduced, in a single
year. Admiral MouChez has taken posses
sion of the new observatory grounds, and
the earthworks for the foundations of the
great refractor building and the construc.
ton of the underground chambers, where
the magnetic observations are TO be con.
Quoted, are being continued.