New-York tribune., 1881-09-12

crank, or pump-handle, movement. Applying his
| muscular force to the winch lever, he sets in
motion the pistOns and spurts stream of water
hls grass-plot. If this stream could by
rangement be spurted back through the nozzle into
the engine, it would, we may imagine, work the
piStons hence the winch lever, and, in last in
stance the mans Now, the dynamo, by
steam belt geared on the axle Of the armature. and
thuS representing the pumper. sets the armature in
revolution and spurts electricity. If we can
spurt this electricity back again, it will make
magnets of the cores i'll bobbns and field,
which, by the well-knOwn laws If attrac-
ton ana repusion of opposite poles, will set
the circular armature whiriing and this circular
mo 4on by proper gearing, can be applied in a
SORTS OF useful waysjmprmis. for running railway
cars. Thus, briefly summed up, the dynamo, worked
forward, starts with steam power makes circular
motion and gets electricity. Worked in inverse or
der, it starts with electricity from outsdcl, and
produces circular motion, the desdcratum in this
case.
Now the StemenS motor starting with n current
OF electricity supplied by dynamo ut the end of
the road sends il along the rails to ne taken up by
the wheels, taken of by electric brushes from the
axle, and passed through bobbins AMI fields
| in small dynamo lying just beneath the
car iioor. Accordingly, when we climb into the
carriage and peer down by the light of n candle
where the worlnen, having taken mp the floor, are
| hammcring and filing at the machinery we make
out these main details: The long split strips of
copprr-or brushrs-reachng from the ear axle to
te axis ol the armature the armatuIc itself, with
It's black bundles Of convoluted wire, resembling
boys bundle of kite twine, ana IN size about as big
rs hi toy drum; finally the iieaa two fiat black
masses Of wire-wra'ped iron, looking much
like two hig quarto dictionaries living one on either
side the armauTc. What we can't scc and what
would he harder TO follow, IS The mnucr machinery
which cuahes the conductor, 10y turning of the cur
rent, to stop slow reverse the running of the car
In the original road, running from Lchtcrfclde-a
suburb-lnio Berin, the rrcnt sent, as ! said,
by dyuamo at the end of tho line mp one rail-
through ;ho engine, and down the other o he home
station. In practice, in Paris, this has not been
found TO work well. Mud and moisture get on the
rails and hurt the insulation Then it has been
reared that horseS-bcasts frequently seen on the
Place Concorde-mIght get their hoois each on a
rail, thus short circuitng" the current, and com
ing to grief manya Wall Street broker done he
fore them. by straddle" in the present system
the en- rent IS sent along double lne of wire on
posts, like an ordinary telegraph line and taken off
10y Ircuon guys projecting from the car. II does
not seem TO work well, however, and up date the
only excursions mado hy the vehicle vc been
under the hamiliatmg traction of a pair Of horses
Your pardon for tins proliX explanation. II You
have managed 10 fellow SO tar W Ithout too much
mental puzIlrn NJ, the primary, notion, we have
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