, 1880-02-21

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cost $4,000, 900, and tfo botlcrs q, ~.
morc. lcaying only 8I,ho0, Iho0ol's ,on ~ ',Noim
npplincts, ii seems to ,a a1''sf'l,!e na 1T othe;
no's Misfnrtllt,rs Ii siM,ak n rnihorl ~ =, NJ III.
on u,1EstIons tl,at cn) fpr Wxnr,mna1" W tAtola
lrs., md tho worst Of 1t l,,IpaTa " Slate,
his lick of precision usually tTtia T., ~ 70 That
fay9r. ,...,,;,; ~ NY own
ttcal durability, nf tiio cofh""I h"It Irne INC prae-
ronnfns to ba tte,nOnstrutnit hw ,'repp, '"op, again
Experimental tests oxtenftfnr n,ns ,nn,ssetical or
r,riEotl tlinn a.ly limp lins nclnfiS loirer
npcrt1otF,--g00 consecutive lIouIr. peen "a
convenience. The lnmp-lrop" " buIha Il uiIhta'te' q
mum CLAMPS, md all-cU1ttl ln tuamMt, ", El!atl.
Mt n prpit for 10 cents with }irat'oions@
Ties for the work, anu to roplaco i a,, iniac. iiac.
ono with a 11uw rlanufActliro il rh,tt!atel
work af a moment, II at Et(,som ga{ In,,n{ tl!a
s!x months, tho cost Of renewing am.ss us ia,'s r.
ttRl consideration. 1t Is evident Il aaatc-
from tho fict that Mr.. Ellson il slif lIifp"eset, "set,
1nGltlng with lto1,s composed Of J,lllcs ssi sasi
rfals lRn carlboard,- carbonIzille cntans Tale*
threnl, for ltstsce,- THAT a Is by NJ ,nasn, tu1a
eertnin Of the lnttur as n ilnNljty mi dt'G5aG!
not unlikely that n now limp nny nil MI i! J.
appearance before n great publje exhi'GGnaA' hhihG IL
IL given. On tho question ut whnt rhnmnnn!EA
structure, u nny, tho cartlhonrsi cNrmss :at
fcr9d nitertO0 llollrso lncnndescence Sfr MI.
aoN's testimony ls not very satisfactory ~
l,tcrascortc SECTIONS appcnr to have i'm NO NJ
an,iMrd. either before 0r after tho r1ns:i "
lllent, ad orc is loft entirely 10 the satc,gvS1nt.
OF superficial examination BY t(lg llnasy.t.niS
senses. It is not. sce,,ti !ically presia presun,siSaa
that aucll molecular tension could be %. n'ain,
tnh,etl, csen III vaeMo, for ny great Is1IntIhI, II,
of time, without affecting tho l!atets, ,nra
or less, md II s1!cl! las been tie vase WIZ wis
tllesc luups Of bnked carlbonr,l, lio sccntits Ni
world would like 10 be assured o[ Il M,ss'1
better authority than TINT Of the unaiI"I nitHi
eye.
.Ir. Edison did not giy0 me MI apportun,,v
lii use witl frcS ones mid was coimirjIai S'.i
to get Mt tic action In another way, lla,u"ir
by observing the vibration Df tic carixm'
which IL very constllcrab[e, aud anIourts To-
tre,nor very perceptiblc with II strong gass
Of conrse, / need not suy tint such q eonlin.
Is not utterly Incompatible with tc II, caIm,,
to durability which Mr.. EtlIsonts aiiin".Ts,
lilvu p,t fUrlh. lie did not clat,n ia M" ia
l,nye demonstrated tho prncticnl ilHlestyucil.
t,fi1ty Of The LOOM and WIS unwilling 10 luako
my tietinitiye statement on TINT point. "'
h1,sci,c8 Of flash, tttlctuntl0n, md .reIno5-
tho higher incandcsccsleo necessary to good
light would necessarily prutlueG 4 y1sYa
Ilurlirt vibration OF tho loop md, ,csjllr jis
illteKinting tho cnrb0ll,, would inlpafr tj!e
atcudfNeSs attntllnbtU with low incalRl,sepnce.
The ttlG1!!a Is Tint low Itcnntltsceucc Is III.
e1r!pntille with maximum illumination, anil
ll1gIl inca1llcsGencB with stcaAlness: onl or
thu 0tllcr n,tlat give why. I saw Mr.. Edtspn's
platinum lnmp In operation III June last, nj
f|mr when the newspapers were tr,astlng IN
his Interest TINT tho question was solyrt!, mi
told ono of Ills assistants very frankly tnai
II WIS failure. That II was such events
have proved. So, again, Of tlle present farm
of ia,l,p; tho glass bulb becomes very llot at
low iiunnlcscunce, registering 1s5 degrees
Fahrenheit, with tile loop between n rel and
Il wlite lIeat. rs slW 1t. It II needless t0say
TIN: II register Of 10 degrees nlny be predicted
n3 tho minimum licat Of the bulb, Ut Ntenpera-
nouIcally tho illuminating powpr II IN.
cllltlesceice. At this register, With sDn pounI,
atmospheric pressure, A[r. Edison Will fn,l
his Eli,ss billEs Of very unsatisfactory ,luta.
bLt1ty, particularly as tho gtnss Is ntltuualIy
heNtWl, Our best test-tubGS sIlap Mt the lu,i-
tom after cxpoyl,re q few times tu ,,neaually-
distributed heat, At,l | cnlluOt beJiri.n tIIat
Mr.. EtljsOn's bulbs will endure inequality
u1ul alienation OF temperature nt invent,
pounds pressure without extrunie liability Ia
frAeturU, Indeed, tllDrU have been many r.
newuls already with tho light working under
the ilnlnedinte supervision Of tralHed ~,
iv; 1 l,,Sy now rccur to tho question OF ccono.
my. Sir. Edison claims forty lights of Six.
| tpgsl.ttlMiau power each from 1iy0 h0rsc.
| newer In rrutlty. llo Obtains forty lrl,,s Of
f.,es fhar faItnn.tft, nD,vur nurlt t'n,Irrd1l,u
tnn.cn,",Ir % n"wnr no lin I mnx1m,,i, ma hors,1
clltllcs, or five Stan0NHl. Nis-bnrilers; 50 thai