The daily exchange. [volume] (Baltimore, Md.) 1858-1861, 1859-09-03

nothing compared to those of Mr.. BoYDEL1's car
riage' The great popularity of this latter is that
itmakes a railway for itself as it moves along.
The american Railway Recieao says:
''This improvement consists in secur,no vootio,.
railway ~ "heels OF carriage in such manner that
rs tey section after section is brought under tho
wheels and held firm for certain period and so o
ing anu taxing up continuous track for wheels as
tie carriage moves along The mechanical devices for
erecting these results very ingenious and smnle
me section rails are broad tram plates with
hanges connected to the felloes of the wbaals ~ ;
working in curved Slots and there are few teeth m th
face of the Wheels and suitable notches in the inner
ace OF the rails so that as the former revolve their teeth
take into the notches of the rails at proper and
thus shift and hold them under the wheels with prrfect
regularity ' fe-'e''
We cannot pretend to describe this steam car
rage, but content ourselves with quoting from
another source some account of what it has really
done. The trial took place in Hyde Park. Lon
don, by direction Of the Secretary of State for
India.
"The engine is perfectly under control even tho
sharpest urnngs Of ordinary streets both in as
cent and descent of steep nclines The pecua mecban
Ism over the driving wheel forms endless tramway
In the engine exhibited yesterday and the dav
this endless rail acted with the perfect satisfaction
quite bearing out what has been before stated that the
engine could not only travel the worst roads but
that the roadway itself actually improved equal
ana broad compression of the rails Though nominaly
the an ndi
Gator OF more than double that amount and the engine
can with draw from sixty seventy along ordi
nary turnpike roads at the rate of four miles per hour
Attached to the machine yesterday five powerful
wagons especially made for the purpose by Croski and
all of which, by removing pin pivot from between
the leading wheels, enabled to follow everv trp
of the engine with serpent like movement which gives
the utmost freedom and eXbility the whole convov
Yesterday more than once the whole train turned in less
than hall It's length and that too in passing over grass
and uneven ground The ndenation by the passage
OF the wheels was certainly more than would have
oeen made by an ordinary coal wagon.n
If this trial is not sufficient to satisfy us of Mr..
BoYDELL's success, the fact that some of his car
riages have been sent TO India, and two have
been ordered by the PAsHA of Egypt, is conclusive
evidenced the opinion entertained abroad of their
usefulness
1t would seem, then, that what inventors have
been so long toilng to effect is almost accomplish
ed TREvETHIcK bent all his energies to this task.
and failed more than fifty years ago; and Door
OLIVER EVANS, even before that time had obtain
ed, after much difficulty, patent from the Mary
land Legislature to protect his invention, which,
however, proved to be impracticable and value
less. But if it has been reserved to Mr.. BoYpEII
to produce the first steam carriage which can really
be turned to account for ordinary commercial pur-
poses it is pretty certain that he has by no means
hit upon the best thing of its kind that is yet TO be
constructed. Our American machinists NAV still
enter into competition with him, and obtain no
slight share of the honors and profits which at
present seem likely to accrue to him alone. I'M
provement after improvement may be suggested
by them, until the original invention would cease
to be recognized in the machines which will be
hurrying to and fro upon our roads.