, 1880-03-17
The CcMcnt for tho Globes Qn
Important Feature OF tho
Discovery.
Carbon Pencils Used Costing Two Cents
and Lasting Upwards Of
Ninety Days.
Tho Cost Of tho Limp less tltnn 81. .25,
and Of Repairs About Fifteen
Ccntss
4 Light Vastly Better than Gas, and
Costing Only 0uo-Entk "a
Muoh.

spsetat Dnpateh 10 Tns Chicago Tribune.
New YonK, Mnrch lo.-Pr0t. W, r. Hnwynr to-
night gnye tho flrat public exhibition Ut his new
electric lnmp invented especially for tlomcstto
illumination. 10 show tho prncttcul workings
OF tho Snwycr systnn, tho parlor iloor Of tho
residence No. 20 Wcst Fifty.fourth strcot WIS
lighted by soven Of tho tninps dlstribnted rs
gas-Jets usually arc.
Irof. SAwycP Bnld In explanation that tho
| lh.nps nru operated upon otie cloctrlcnl circuit
s,lplllcdhy single guuerator Transforming four
hprso power. Tho tllutometro tests Nr0 tnHslO
With SugR phntomcter, such ns ts tiscd by tho
gas companies fur tho sasno purpose.
Each light wns registered M oqunl to twonty-
sovon 1ivo-standard cnn1les, tr a little moro
thun twice the value Of a ilvc-foot g1s-l,,rror,
which usuully registers from ton to twolva
ca,,d!cs+
The lamp, based upon tho incnndosccnco Of n
poneil OF carbon Immersed In nitrogen Ras, is
nat dlIlcrurt In princplc from tho old sawyor-
Mnnr limp.
The pc,lclt is contained within globo two
inches In tEamotor nild ton Inches high. eonleCRt
the bottom by 1ncats Of n cement, which, whlo
ndhcrnE perfectly 10 tho glass and metal, Is suit
1tcicntly elastic to compensate for tho Unequal
| expulsion Of Tho two and softeAs only Mt q
Temperature OF zoo deg. FnhrcnhcIt. This
culnuut IL Il compound lung sought for unsllc-
cOssfulty.
Tho globos aro charscd by tho Stlilmnn
process, which 10 80 sIinplo aud rapid TINT fifty
ianps can he prepared per hour, Mt u cost OF
about 20 cents, nnd In stlchwlsc thnt. nccur1Ing
TO atlllmAn's calculation. tho amount Of ntlnos-
phcrlc mir remaining Is only ono Boptllionth OF
tho normal quantity.
The total cost Of rcciargIrg n lump with nitro
gon IS two and thrce.Ifths cents, ayninst II by
tho process tta,ln1ly employed. Tho carbon pom
ell. suyen Inches long and ono nnd qunrtcr
m x1.$ tr fn,t
lnteKrnt1on takes place ut tho point Of contAct
ny means OF Ii regulator, which will bo substl-
tutcd before long by I'll automatic feeder.
hlr. HRwyer said ono OF theso points, used Ny0
houra dhy, Will lust ninety dHyB at tho mini
mum, md two ycars at tho maximum, accord
ing to his experiments. Tho pencils cost Is a
triio less than two ccnts, and tho cost Of re-
nncins n1'l rechargtng with nitrogen Is nlno md
throc.1lfths cents,
Impractical uso Mr.. sawyor estimates tho cost
OF replacing IN injured or broken burnnr at ii
cents. Tho globe, not unlike TINT Of tho pr,tnnry
kcrosone- -inmp In gcnrral nppcarnnco, IL in,-
hctlslcd in nickcl-platcd baso, which may 10
highly orlla1nented'
Tho cust Of tho lump Ia loss tllan $1..3.
Tho now systom comprises also mo.llncati tion
Of tho gunerator of electricity, uilartiug It to
tho principle Of incnndcsconco; a new ilstribu-
ting system: II rcg7tintor whorcby only 40 much
ci,Trent 1s supplied ns Ia called for, nnd thus
power Is not cnns,tmcd whom not nccich; and
now meter, cntmch to be fnr In nd
vnnce Of nny yet perfected. It n placed
in tho ccltar md rcgulfteA by automatic mc,lns.
Tho light is rcsIlly lowered ton glfmtncr by
simply turning Il button.
Frof. sNwyer estimates tho cost, compared
with gas at Sa rer 1000 fcet, In tho proportion
OF two to ten. Tho light ID trtlso stronger than
gas, but steady, soft, md pleasant, md worry
much itko gas, tnstond Ut haYinB tho glary whito
light Of tho anwycr-Mnnn lump.
a company has been formed, chilled tho East
ern Electric Manufacturing Co.npany, and 1nrgo
numbers Of tho la1ips aro being m,,llufnct,trc,l
AUtive .NGaal.rrs will 10 taken to iatrtduce tho
now light. which ccrtanly makes promising
Appearances.