Wilmington daily gazette., 1872-06-11

From the Philadelphia Telegraph.
The Shaw Propeller Pump IL hollow tube
Of any diameter that may be considered
necessary, through the centre Of which runs |
spindle. Upon this spindle at proper intervals |
are placed s+gments Of screw, and when. by |
the application OF steam power, the spindle IL !
made to revolve, the water Is literally screw
Ell up from the bottom to the top Of the tube,
Just exactly as by the Ericsson propeller a
vessel il screwed through the water. This is
all there IS about the machine. and any one
with the slightest acquaintance with mechanics
can 20 to work and calculate exactly what,
with the application Of a given power, 1t ought
theoretically to perform. The question, then,
would be to find out by experiment how near
the actual performances Of the pump would
come to the theoretical calculation. Expert
ence has demonstrated that the Shaw Pump
| will utilize At least 70 or 10 per cent. of the
now~r, while the most perfect pumping ap.
partus OF the valve and plunger kind will not
utilize more than from 30 to 65 and when we
take into consideration that the Propeller
Pump Is simple In construction. easy Of man
agrment, and cheap its superiority IL manifest.
On Saturday very interesting exhibition OF
the performance Of Steam Propeller PHmP
recently erected by the Hydrostatic and
miles below Delaware City, was given before
a party of gentlemen who went down for the
purpose. This pump is In use by the st.
Georges Marsh Company. which has taken
up q very large tract OF marsh land near Del
aware City, which 1t is proposed to bring un.
der cultivation. This land, before the erec-
ton of the pump IN question, 1t was found im-
possible to keep free of water at certain sea
sons of the year. and although inexhaustibly
fertile, it was practically valueless. We be'
lieve tina: the pric. ut which it was held wa,
about forty dOIarS per acr' but no one cared
to own it at any price. Since the erection OF
the pump, however, and the demonstration Of
Its ability to control the water both Tor dr1ll-
age and irrigation, the land is estimated I'd b'
worth fully $3.50 per acre both tor grain rails
. ing and grazing purposes. rs 1t is among tn,
richest in The = ate Of Delaware. The Shav
Pump in USE by the st. Georges Marsh Com
. pany Is the Mrgss yet built. being thre
Inches in diameter. II was put up with
of water per minute, but on Saturday !: easi
, worked up u 30, ,0O0 gallons per minute, til
whole power Of the propelling engine nc
: then being utilized ON account Of q slight Dr.
\ feet in the boiler which prevented 1t frol
) furnishing all the steam required. The watt
!. rushed from the mouth Of the pump in soil
stream three feet In diameter, and with
/. frightful velocity, while the entire machlner
worked with the most perfect snoOthness an
. without any perceptible STRAIN. The etficienc
/. Of the pump was fully demonstrated. and I'll
II only question was whether IN raising wstei
Il a great height the same percentage Of pow
= could be utilized. The Hydrost and Hydra,
Il lie Company, however, contend that with
several hundred feet the loss Ut power Is u
!. arpr.ciable, and that the efficiency Of Il
~ pump In this respect has BEEN fully demo
=. strated at the Glen Carbon Colliery, In Schu,
kill county, where the water Is raised 27S fe
pr through tube inches in diameter, whit
I'd throws l600 gallons per minute