New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1878-08-24
FOR THE PEOPLE.

seems TO have delighted the scientific visitors 10 Par
moro than the progress made in electric Illumination
Mr. F. L. Pope, in describing his impressions In The
Journal Of the Telegraph says "when in the course OF
my first evenings stroll along the bOulevards of Paris,
came suddenly upon the dazzling spectacle OF the
electric lamps which encircle the Place de Popers and
extend for half mile along the Avenue de POpera 70
the Paais Royal was struck with surprise and adml-
ration. The effect surprisingly beautiful. There
at the present time 800 electric lamps nightly
in successful operation, Illuminating the boueyards'
gardens and public buildings OfPars and ARRANGEMENTS
for lighting all the principal bOuleverds and places are
in progress. The magnetO-electrie apparatus en-
ployed is Gramme machine arranged for producing
alternate currents The candle employed is the double
carbon construction of JablOchkof Owing TO the pec-
liar arrangement of the alternating machine IL is posi-
BILE to divide the currents furnish sufficient cleo
tricy to sixteen separate candles That this
system in a scientific and practical point Of view Ia
literally brilliant success Is sufficiently evident
to any one who like myself has carefully watched
its operation night after night in the streets and public
places OF Paris The quality OF the light is pure, soft
white the general effect being not unlike that OF an
unusually powerful moonlight but differs from the lat
in the absence of the heavy black shadows Ihese
are avoided partly by placing the candles within globes
Of opal glass; and partly by placing the lamps at con-
siderable elevation above the ground perhaps twenty
feet or more That the system Is equally successful In
an economical point OF view, in some OF It's applications
possibly premature to assert that 1t Is destined speedily
to supersede the employment of gas for all purposes OF
public and general illumination large scale, yet W
must be said that such result seems 10 me eNceedngY
probable" Professor sman is equally entH 1 si
from Mr.. Pope in believing that the electric light WI
dsplace gas for domestic use or Tor common street
lights.
ARTIFICIAL INCUBATION-The fact that O
good hen will lay annually 100 70 $50 eggs. while II can
only hatch thirty or hrtytwo OF them, has led TO many
at According NJ.
Grnhadt Of Dresden, the Of the indifferent sue
cess Of OF these efforts has been that while they
have variousy aimed at producing and regulating the
reoured heat they have not had regard TO the mode OF
communication Of this heat In natural Matching the
heat is transferred the egg from above by close con-
tact of the hens body and this required by the struc
ture of the egg in which the germinal vescle always
floats at top, whatever the position Of the egg. In view
Of this Canelo lin Englandl has successfully Matched
eggs by means glass plates put them and bathed
with warm water further step is that OF Baumeyer'
who replaces the plates with tubes through which
warm water OF 400 G. circulates. MN. Grdnhadt says
The English Mechanic have worked on this system i0T
several years and variOusly improved It, Their small
sevenytwo eggs 1t is heated with smokeless petrO
eum lamp and Is furnished with an automatic regulator
OF heat that personal attendance Is reduced 10 Ln
mum Of five TO fifteen minutes daily.
CONSUMPTION OF TIMBER.-In pleading for
the protection and perpetuaOn OF forests The Lumber
mans Gazette gives interesting particulars OF the
amount timber consumed year In this country
" We have now" it says about 10000 miles of rail
road the annual consumption for ties slecpers alone
is 40 100000 thirty years growth Of 10000 acres
TO fence these roads would require at least 100000
miles OF fence which would cost 45 900 900 20 build
and take at least 49, 100000 annually 10 keep in
pair We have 10000 miles Of wire, which requires In
its putting up 100000 trees, while the annual repairs
must take 100000 more. The little, insignificant lucer
match consumes annually In its manufacture 100000
cubic feet OF the finest pine The bricks that
nuay baked require 100000 cords Of wood, which
would sweep the timber clean from 10000 Shoe
pegs quite important article as matches or
bricks. and 20 make the required annual supply con-
sumes 900 cords Of fine timber while the manufac
ture lasts and bootrees takes 100000 cords Of maple
beech and birch and about the amount required
for planest and the handles OF tools The packing
boxes made In the United states ia 1874 amounted to
81 900 900, while the timber manufactured into agr
cultural implements, wagons, etc. is more than $780,
600 900. The farm and rura fences OF the country
sumo an immense amount Of lumber ana timber annu-
ally but gro Older as nation, this consumption
aud probably WILL be reduced by the more general
OF live fences hedges Our consumption Of timber
only daily the Increase but expectation ~
timber Is also rapidly increasing our slaves go by The
million 10 France annually walnut, oak, maple aud
pine 10 England, and spars and docking timber TO China
aud Japan"
FIBREs FROM NETTLES.-The cultivation of
the common ncttle a breproduclng plant IL trial
stralau Berlin, where last year field yielded in
Autumn branching stems from three feet four feet In
height This year the nettles have grown vigorously.
The plants everywhere dense and stems, mostly
without branching, have already risen to four and in
many cases FIVE or more feet. The field has not been
manfred wecded but the nettes have suppressed all
weeds with the exception OF few species OF compositg.
The prediction that the nette would spread neghbor
ing fields has been fulfilled The whole field Is now
IN blossom, and decisive experiment Will be made,
whether the nettes may be cut down at this period
as 20 obtain the hbres In greater Nhtencss neness
should ts be the las with netc culture In China,
Java and Indal it win be possible TO reap the net
ties at least twice. doubling the YIELD and Improving
the crop, by more abundant formation OF seed.
DESTROYING YELLOW FEvER.-It is well
known that the germs Of yellow fever destroyed by
frost. Acting this hint Dr. Rushrod w. James sug-
gests, The Philadelphia Ledger, lighting the scourgc
with machines for producing artificial cold He says
Let every quarantine station have n ward or room ca
pabe OF holding several patients less, the
exigencies may demand arranged that ventilation
can be maintained exclusively through ventilatOrs aad
by OF small anterOOms with spring closing doors,
and then have mode Of entrance exit 10 the ward
except through the ane-roOm. The ante-room should
be kept at the low temperature or even lower
than that 10 the ward that the temperature in the
may not be raised by the opening and closing OF
doors by the attendants any OF the disease prOduc-
ing germs escape before they thoroughly subjected
TO the low temperature and destroyed The ward and
Rnteroom must be kept at n temperature not higher
than twenty-five degrees Fahrenheit Keep the patients
comfortable by a sufficient amount OF bedclothng ana
everything that from the room, such clothing,
excretons all emanations etc. must DO exposed sui-
cient length OF time to the cold This will kill the pOs-
onOus germs reproducing cause and prevent far
the cases under treatment are concerned any risk Of
the disease spreading. II patients cannot bear
Go d yith no mode Of access or vent"on o
through the cold and everything going OF the
warmer room must be allowed 70 remain q sufficient
length Of time TO get rid Of the contagOn. IL no at
endant occupies the anteroom the degree OF cold can
he kept Zero IN order the quickly TO destroy
all the disease-producng agencies"
THE DISCOVERY OF VULCAN.-In a recent
lecture at Rochester Professor Swift thus describes his
finding of the pauet Vulcan during the total eclinaa NJ