New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1867-07-12
SCIENCE

DRAwrRGs ON PoiasHKD AGATE--.The curious hg-
rrs sometimes ionnd on aaee may ss , no vette win
sirens eolqopcf ne Of Se and sf }r y NJ he'd
tyso or t6Gee tines Il viii Soeoie redds If the sou
ton contains oneelghth OF common SCOT and ono 1gth
s Sr g. PS w y' snBan aSS fer tho
snhstances Iastnamod solution 81 chloride OF god
oS s aTSsrances These Crs uge unaffected by
tEe atmospheric they win reappesr after washing "eh
W,SSlER IASDscGrE--InG Germany materials are
put up ana sold for making an Interesting eielniesl 60
paTt and wafer three parts ass Of sal anDaoo 'chlor
he Of ammonium fragments Of about the ne o s
into botl6 or glass 80 the depth Of say Two ehSs, anu
then pieces Of sal annobl.c s1 foG Pos Nae sn
white crust Is deposited JoIInng miniature repiesesS
t,oss Of trees grasses and rocks covered Win SHOW
TSose who intend repeat the experiment must bear III
n1Sd The tact mat the nitrate Of lead Is poisonous
Lear At PARsI9 the Rag S S Of the and Ind
ero another the banks of the Seine inst above inc
stands on an island small lake pond The str1c
fnre OF iron and contains staircase Win ~ eps
hight cont, be seen at sea nom dstafoeo Of % miles IL
DsO h. finally placed elevated point Of the HocneS
DouVree an ISLAND between the Isle de lbthat ann
Bne1nscy about IA leagues FROM the Port OF Porrio
The mode Of Illuminating the phsros nov GENERALLY USED
who first demonstratos that the fluctuations 1oa9chg
asht move ~ coss Of zc or semeuis q s
surrounding the central flame, whose focal rays arc ~
ton s ONLY n meridian planes the natural divergence In
sEnlnth bong unaltcred hut in the revolving fs inc
beams, each q which by the rotation Of tie apparatus,
are brought to the eye Of an observer
PURE DISTILLED WATEB.--Stas. u ms researches
regarding tOIuic weigbts ito obtain perfectly fre wslse
destroyed tfe volatile Organic matter which Is JnDe 20
tSronSha long tube Of copper ned with roasted copper
fnrnnRs the water condensed from TINS yapor %as re-
distilled platinum refrigerator h"%eNt1, nniihS
shls process too slow, me devised quicker hetho1 Dy
which prison may pgodu99e, water IN wfG maier T
puy cried manganate Of potassium Win Vhe
est quantity necessary 20 dissolve the Whole
And ei res. in closed vessel -Four five per cent "
the solution, which becomes OF clear anH uetpelSp
tnre has left - hours he pits In the retoPt WIN
TIA hire two OF concentrated SOLUTION OF nagau;e OF
etassium, and an equal volume OF soluon OF hyHso
potassium sufficiently concentrated 70 gave stabity 10
1be salt and 10 enable Its dilute s0tiOn to resist for
longer time the action 81 heat deeopOsng tts
Nater ana the whole distilled IN the usual way. Wien
water is used the ammonia r. not removed by thS
process and II is essential 10 redlsn ~, Win e SIou
eaDdtbs Of moDO-sohc Or mon@pGtsssc silphate
THE GREAT PYRANTD.AIr. G. HaZzi Sniyth's new
work IN volumes, containing on account orthls
peTaons n Egypt during he first four months OF 1865,
lust published has again attention 70 the Pyr-
hds HerOdOus. StiIbo Iliny and IRE ARABIAN Wtii'ls
ell eOBouTed IN the statement that the Great Pytalald
WAS originally eOVeled with white casing Fur many
years this ktatene was not believed hecAusc no aces
could found. However iD1e3I Col wee toluio TWO
easng IL st 1key were ~ wEile limestone lltn
she Mokattam hills A. early as tie year 1000 me k;iLiS
Of Egypt began 30 strip OF this casing The hiVekS meas
nrng by D. used IN building pdiaces mosques
and bridges Those which renamed were nesf tne fo
natiOn covered with sand nt the tune OF the deVasa
GOn alluded 10. They were out 10 Iu st tellv1t
The tine angle or be - ad's slPYe was determined ny
Of the remaining easnt as l9e;,ssH oy f{Si
square side being 10 feet and the ofginay night OF
HE pyramid lS6 fest r Johb'IaJlor was te nrsS
discover that the hight hore the stIe ralloh 10 te
sum Of two sides ftbe base as The diameter To the CIR
eupfeIenee circle carrying the fraction 10 only two
0gures the proportion being thus ca pressed
= Sgle