New-York tribune., 1876-01-31
APPLIED SCIENCE.

I'srs or GTI ATiNOUs HYDEAT.D PHOSPHATE OF
IINs.-Dr. sscc has pu5U.Hrd IL memoir np"n the
industra Applications OF gciatin0u5 hydf%teG Phos-
nb,te of Inns, which, according 10 his account, pre-
cipi.4tes colOrug hdJt.r hdcn as decOcdOh ol
powdered cccaiueal, Ia tic condition OF lac; as
also the .,ttaIic oXiJes-uaong otaeis, that oil cop
Pr. Is ..is..y fJr yoo,n3 ta,t,r rs, II a5 t"''a,
even -i,,,,r ouJd tajt o. aicd.Ie.'' ""'oH '' N'H
re.tlLy r,dCu lh Vd .luU D. ii 70 To- '''1 il' -
tiu, b, o., necessary 80 utGONuc5 tLt CSoue III d
sout5a ul pllspua.e o. hne aid moo or ie's
d.u.. h}d4ocniHic aid; thea to viii oH' tNe
cloths aad p..co taO.I Ia al ainAllhe cO4CI D"'h
CAUSE oe TIE BLACK SPOTS On 1n% ecALts or
F.sn-IAe a5GorAiai occurrence oi black Spots Oh
specks upon tno scales external surface "i haos
ba, fr.eu,.uy been observed and qHi'e "iteh
mist ken for r, lar coioralioa Dr. fa'o % GENEVA
hoveyer. has been investigating soinc Oi ilcbo
cas,,s, aid lads that III hta.iy al ol tltm sn.a
pafasi worm occupies tie centar OF thia spot ana
is e.gly Oh aryaDlc 10y tne microeo'pe. ihis ls
i.plos.l t. two e. IS with peculiar h4Ud ptt"cth
t..e inner bo,mg oval ana transpitenI al" te oHtci
rouna w4tn tnck Fl 'tCss walls, oatsdo ca "i"c1 ~
tla mass ol htI-a.i"lc,. pi.l'eht .o'' An' A4' ' %
s.sgoo 4 tisis WO.lI have 20, ycl Dioh !i-' o"'
stluuEI II quI,e probable that hen BE li7ii Is
ucyOuIrd by II, p;c..ccOus neisnh"f5 Ihis e"Icls
il.o aAOtuo. rt~Ac ot tie ~ clhtt"io oI BchUl''','
w.icu have become % familiar OI iale years 10
Investigators.
Guasuroy Of Vienua found tnat chemically pure
OK. er.ne ,sJ. gr. l.2O0J), when heated 10 3O- >
harmed CnietlS wl,A a blue, nOA-ldniaous t"hi''
without tho least Odor and without leaving any
fe .Jue aul ais, that gly, crime o low specific gray
iv IL not too dilute, may be burned BY iAt'lh9 OI Z"
wiuk or cotton uunctotd IN it ~ an open p'ice."''
capsule. SoIeiiug has recently con nH'.ie"ltd Tue
fact ,hal il can bo burned il any lamp IN "E,h III
flame i. Immediately above the ievl Il tie hqni"
(s,i,h as tho BeGlcus lamp, its thick c0.,,,epc%
ur.N sAtil It's giving 90. S,aGt nNGc Win IL isit
N,rn S.U = III Il .nc i3 Jut eHgdJy CoiViso, 'ihV
a. of ,cChc ind ii CO ,t ~ E"., "et'
for salts, lie f0uud il pp-,r"D of tlic lon %
Lu.rclt col .rei tame; aud he suggests iho M
por.aut, ul IIttLeI experiments uIVn iht "NaP'.
l. $50 0i & tO Illuminating purposes ~ mixing "I -
other Su tli,eS Ueh a. cai5un, ana aih0 upon l'a
Lc.u power. It's chcsi LESS ahu ne 'N"iI t II,
d,...,i. tU..- 90 It's comparative n"A-N"a'!ntE'
you'd render il Gse for lie ABOVE PURPOSES uN' -
b.o.
ELECTRICITY rRoM DIPPING METALS IN FLUIDs.
If two siini;ar pieces Of metal are siinu anoousl
lrnmcrssd IA iGii, they give no electro current :
bat il dipped sUccesCiyely an electric current 's
observe! as has been long known. Ia i'ct, th'
elec,r -Iuove force, as toe separating sifc'i '"'
G.c.ai a. lI t.s Guid, varies acoo ding to thc ii"'
that they have been in contact with cach oihvr
This variation of the electro-inotye fore i. ~
many cases, purely secondary phencueaon' IL
th5t by che nicg means foreign substance Is form
ed betwssn the metal and the Huid. which greatly
changes the separating surface and gives riao to
chemical polarization. Electric currents ore also
in these cases. due TO the accidental formation o.
fjrein substances and TO t.o exposure OF 'Le mcia
10 the atmosphere. or to contact with the hngers.
I;,t even vhrH for'a,i sUbs,a'ces sud c'"iniot NJ
iue1yrs arr cHclid dtG NJ the Gcst per oct manner
uss,i.l 3s f,r example when platinum or s3id ia
q d.n.h i'm water, movements Of the needle are
I'll visible; Il il has been suspected that the
Al winch rs retained ia contact with tae surface OF
tie uyta' rr perhaps the met-oi that has been n,
riovg3 t c,aansc thr platinum or g'd may nave ia'
A. ianof. ant influence III bringing a5oIt ga ceGtuc
cu.ro'i Gui.,bc has recently sill .ctrd this r"'-
no,..on 10 careful iIye,t gl.ou, AID lae observed
tb.t te strength of Il electric current o. cfcG%es
v-th f,c Increasing resistance OF the column ot
dltc.n lL.. 4ltctlo les: that i ncIt aSas VIII
IT,. a5,rls d, strength OF % concentration of Vhc
.ol. 9ou i,af may be- eluplo,ci that II has 40
i,.ion In N. riuillarv corsti,r. of thc fluids
nl,red, a.J ihat Il OF gina e. PROBABLY i'll q chance
h lie i,o.ecular condition oi those portions % iA'
fluids when alc in tne igduOr-Cjd OF the uet@liic
surfaces
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T.E ELECIRiC LiGAIu'toh Al HVC''' I"'''-