New-York daily tribune. [volume] (New-York [N.Y.]) 1842-1866, 1860-04-28

was covered with ne franks OF trees which appeared
to have been long under water aad Of Spscos no long
er hown In thoss para
The colo,iDg mater Of lasves has been shown
lately not 10 be amply ereel, bu.a combination Of blue
and sllow to which 10 tbs autamn m come instan
ces ADDED rei color TIE change IN the color ofsaves
curing the latter part OF ihe sunmer Ia Cue TO the
change in the proportions Of thee simple colors.
M Dmothsr, who has lately been making an Ok.
eurron 10 Nicaragua has proocuDded theory Ct the
durpal vara ions Of the barometer which he has been
studying there. de siSiSo,es he variat;ons 10 the
tides produced in the atmosphere by the solM rsys
-Marahal valart has ZEN. 70 the Fr,n-h Academy
sn account Of insect which amusss Ktef by boring
holes IN Ieaden balls.
M Poussip, Of Paris, announces that he has sue
Gee oed IN fixing the ooiofs dagSerreo'yps plate
Hs principal sgsptsre the esssnt.l Oh Of eilyhowers
and the chloruist Of gold
The Geographical Society Of Paris Offers prize Of
gal to Algeria, or from Algeria 70 Senegal, BY way Of
Timtuctoo.
Mirrors are row made BY prtcipi.ating platina in
stead Of silver on the back of tde gas. Toe surface OF
he glass covered ~h tie ohlOruee. Of pl.sns, aud
che msta Ia prespiied by the essence OF lavender.
The very thin plate Of metal thus prodceea then fixed
by vsrnish of boray.. Tbese mirrors will resst the
action of the cir much better Than sii7er mirror, and
they are cheap.
of The French rifle1 cannon used in the war last
summer, il ia said that the bronze pieces were worn
out; N. Cbristoae 10 sxperuensug ~irb bronze Of al
minimum, which promises much bes1er results.
From two to five per cent Of tungsten added to
esst steel proc uees metal which Is mu,h better than
teel for the manufacture Of edged TOOLS Instruments
made with 1t retain their edge four times AZ long as
those made with Ordinary steel.
"A new red coloring matter, called fachsine, has
been produced, which s quite equsl IN sp!endo, to
coctpes 1t is already in to considerable extent.
M. Liebig recommends that The acid generally
found In bread be neutrsfzed by the addition of little
lipss-water, enc quart TO tsn pounds Of -four.
The following rule is given for determining whesh
er house room 10 too damp TO be occupied with
eaeiy: Put quantity Of quicklne, fresby burn., In
q vase and expose it uncovered in lbe bouse or room
s,er shutting the doors and windows If at the end of
twenty four hours it hiss gained in weight ona Eve
bundredh cafe; If more than Que hundredth, it is
very unsafe. Between these tw, extremes it is
or less healthy.
Mr. Routzsu Of Orel Russia, has devised meth.
cd Of wapDg by steam applicable to the transportation
of heavy Height in he winter. 1t consists
in dragging on shsad o rope or chain by means Of
borsss anchoriog IT, and then drawing up the freight
care, which are runners, by steam power. The
cost Of transportation in this way about three cents
per tun per mssbout hall the present cost Of freight
op The Rus ian railroads.
"A new black, whish can take the place Of ivory
black is now prepared FROM bog-head camel coal. The
coal IL fret cal med in oreer TO expel the gas which 1t
contains in considerable qnsutity lis then ground
and screeped. II can be used nstead of anioaa chsr
coal in sugsr-refneres, for dnfec.ing and fer print
ig-ipk.
-MessIs Wynsnt aud Ward announce that they
have discovered Of Extracting soda and potash
from feldspar orbose snd albs. This is easily done,
Blu; it is not easy TO doit economically.
Copying paper is now be't made with solution
Of proto-sulphnte of iron. letter written with com
mon ink which contains infusion Of nutgilla, or
which has for is base tlnno gaate Of iron, viii give
sInfect fsc s,mile Paper 80 prepared. II little
ugsr or pyr q sIc sc, 70 aided 10 shsop5nayy Ink
ttere Is no need If 3 press The copy may be taken
by merely laying oiled paper the copying paper
and rubbing i. with the hand.