The sun. [volume] (New York [N.Y.]) 1833-1916, 1897-03-28
ADVANTAGES. Il ny. are claimed for

- NuubD-uuUut motONu HINluA vi EuB bu
y~antares sought TO Be secured by the use of tn
storage battery. with none OF the defects. Mo
: spsr. aSs G npsn tSs in. tor sSs Of f sh.ir son on .nsa
with q distant source Of power. Motors tina
can run in connection with any othcr system a
mits q test with single motor ut a minimum
expense. with ability - extend indefinitely n
A syStem that admits Of Reservoirs pns s'% SeIma
placed under the trail cars Of a train to 81 oply
air for runs Of any desired length, A system
! which in reliability 10 superior TO all others. A
blockade such az so frequently occurs whet
motors are dependent upon transmitted powel
become disabled on the line no other would b,
affected by II. and tho noIt motor would havt
surplus power sufficient % push It TO che power
] house. the reserve provided bsinR Away SUI.
/, nctent for q run OF several miles.
Q:-what time il REQUIRED to eharne . motor
station reservoir. At. 126th street. In the
presence of . lumber of invited guests, a mo
Q.I,Do you experience any trouble from
.A.-.Nota particle. That is adimculty tina.
reheattnE. High.prcseure air 10 too dry 70
freeze: the moisture Ia squeezed out by COM
,o.-what distance can n motor run with one
.A.-That depends upon reservoir carauitv.
milen. bat when there arc trail cars upon which
reservoirs can DO placed tho run can DO a.
uenuou TO any extent Ge9lreu.
suS j." n' 10 you prefer a nigh to a lew pres
-A.-Because It increases greatly tho length
Ration OF pressure within limit OF uerfeci safe
Is. Becaus" II avoids tearing up streets to Law
ali annoyance from frost-. Hscsuss IL is rot
only better. but cheaper. than any low-prsssure
o.-Is there no DANCE: OF explosion,
Al have answered that question in the
Scientific american Supplement OF Feb. 30.
o cssS: AZ neauifg rs o,Soo pounus ~ prS ns 10
to the test limit Of 1000 pounds without eS-
ceedinE the elastic limit and without risk. In
service the pressure II limited to Q ZOO pounds.
The margin Of safety Is 80 large that all danger
~ ruptu Q ia eliminated:
OFF a rupture should occur what would be
tho CONSEQUENCE
A.-Several cylinders have been rnptured
pnrn: sely by increase Of pressure. Tho ma
tcrialt is so ductile tina. It will stretch one inch
then a simple rent Is formed. through which
the cold mir escapes. 80 pieces are ever de.
ly di erent from those which attend the ex-
plosion Of q steam boiler.
Odd you notice q published statement by
Mr.. j. d. itmmins to the effect that n liie
operated by electricity Was cheaper than IL
compressed air were used?
the opinion OF Mr.. Crimmins or he would not
have made the statement and no was entirely
correct With the information in his possession;
but he did not know all the facts. and could
not have known the cost of operating the fIer-
die system. A French engineer published n
statement In the Scientific 4 american Supple
ment of Feb. 8. 1897. in which similar state
ments were made. but this gentleman based
hi. hS T upon a eomp D..Tts IN With a .ow.prss .
admitted that he had not exaninc the Hard;e
system. but assumed they were substantially
the same. have answerec this paper in the
Q.-The Nail and Express OF Saturday con-
Ian srne Of 'n Philadelphia isUSsI 10 e IntGlsi reasons Snsn for Mr' the the
adoption Of the UNDERGROUND electric system
in New York and the rejection Of compressed
air. uaye you any reason for dissenting from
the opinions therein expressed?
Al have. There is not an important
ste 70 ncnt In this interview, that 4. not the re-
GUS. l have a slight acquaintance with Mr..
Dolan and have great respect for mis- opinions
repptation, for intellicence and fairness. He
would mako nc statement, that he did not
lie is not and does not profess to be an enxi-
necr. ans depends upon others in whom no
M nss son bs 1ss.ra rs he o o9sasisfss.s or, m and qsd to
pended by himself and his associates is rot the
evade the Hnrdis patents and invent a suhsti-
tute. You may think II strange when l sa, that
than a failure. The held is wide snoiSh for
all, and when The merits of compressed air sre
recognized. as in time theJ must be. II the ft-
test survive the process OF evolution. the or
without great delay. II Is the failures that
required twenty-five years to bring the Hardis
motor to its present stage of development and.
In tlme.,ir is possible that the Hoadley motor.
to which Mr.. Dolan's remarks apply. may
also achieve success. But l protest against
any condemnation Of co impressed air in come
Its application is attempted. Taere would be
no moro reason In this than IN c~ondemnin.
s tenn T to use shem With SiaS baal s' eons ars aed
Apolian ces.
offer was made of 500 900 for a motor SUPERB
or % those in use. Why was not the offer
A.-The offer was ssh. 900. not 500. 600,
and It was accepted. The construction OF a
motor was com nencod. but before II could be
completed the offer was publicly Withdrawn.
ming successfully at Rome for two years. and
numerous certificates Of success were given.
sity because perlnission was rsfused.
the Introduction OF compressed
air require the streets TO be torn up and new
A.-Not at all. The compressed air motors
are. 1t is true. q little heavier than tt present
electric motors. but as the weight is spril G.
tracks. A dead weight upon the axle. on t.e
authority of the late Franklin l.. PoDo. tic
rs hard upon the track a, one that is spring.
supported. Ths weight upon the wheels OF the
air motor Is only half as great as on the drivers
lieht cross-ti. track. while the trolley requires
a heavy Kirder rail.
Mr.. Dolan thinks that compressed air has
not been . demonstrated sncCess. is q system
like the UNDERGROUND electric. which 10 blocked
In the snow storm. n demonstr. Ted success!
II may be pertinent to inquire what amour: of
demonstration Is u be regarded as successful.
have been two cars. not one only. run
ming regularly TO schedule simmer and win
wi bout losing a trio and performing service
" 18th entire satisfaction VIXEN the underground
ele :tric was blocked. This night be &c. rid
cred, oven by cautious persons. rs demonstra-
ton. II q locomotive engine nerfvrma regular
SOL vice for seven months NO one would aues-
ton the fact that n thousand motors of the
type would do equally well. and the same
10 true Of an indenendent motor run wish air.
10 no difference between operating one
car. and operating. one hundred. except that
the Increased number the car mile OK
would DO greatly reduced. An indie
peudent motor run As long as the Har-
die and under tie same variations of atmo-
spieric and other conditions with demon.
success should inspire confidence as
much as II there were several hundred. Mr..
regards tho storat 80 ba. tkrS as tho ideal
because each has indvpenden; Do yer.
Why not then compressed air for the same rea-
son? Ea:h car Aas Independent power. Tho
weight Is rather less than that OF tho storage
but while the cells OF the storage bat
terry require several hours 10 be charged the air