The evening telegraph. [volume] (Philadelphia [Pa.]) 1864-1918, 1866-02-28
PREVENTING ITS FORMATION.

The vast increase OF steam power throug ughout the
world, ana it's varied and multiplied applications to
oil the pursuits of civilized life, have of csltv,
made the question: GLOW can the use OF SO I'M
portant and indispensable an agent as stoam be rem.
dered safer and more economical" one OF vital
importance. That there are most serious difficulties
attending its use, and that these welk known
difficulties add greatly to the expense, as
well as to the danger to be apprehended,
few persons will deny who have had
any experience in the use OF the steam boiler 1t is
to of the most dangerous, well as the most
penslve, of these well known difhcuties that your
attention is now invited, viz the formation OF the
deposit steam boi ers known to engineers
"scale" 'incrustatlon, formed out of the earthly
salts passed into the boiler with the wator used
the generation of steam. 1t will be readily acknow.
ledged that of the most serious difculte atond
ing the use Of the steam engine, especially
going steamers and in limestone regions, arises from
the rapid destruction of the boiler, caused by the
adhesion of this scale, ncrUstat on to tue tubes,
fnes and, in fact, to the whole inner surface OF the
boer-so far, at least, that surface brought
immediate contact with the ioatsr.
1t is we'll known that the calcareous deposit
formed by the proce-s of evaporating watJr into
steam causes stony incrustation to attach itself
firmly to the interior surface of the boiler; and
Wnen tDlb IL alOW6u. To CONTINUE LOT any length Oh
time without interruption, it incorporates it3ef 50
firmly and completely with the metal of the
boiler to become a part of the boiler itseiwith
this sadvantaRe, however that it is a very imper-
feet conduc or of heat. The crust thus formed Is
frequently from quarter OF an inch to an inch or
more in thickness. Indeed, 1t very frequently
chokes or fills up the tubes of ma-lne locomotive,
and stationary boilers and thus the destruction of
the tubes, if not the whole boiler becomes In.
evitable.
Hitherto this very expensive annoyance
has caused engineers to to great
many expedlenIs in order to get I'D of SO
destructive agent-cuch variety of scale pow
dsrs molasses tobacco, etc.; out all these remedies
have eventually proved that they worse than the
SCALE the adhesion OF which they were intended to
prevent, as the action of acetIc acid tino which
most of them themselves) on the facs Of the
valves and cylinder has fully proved.
The reason why a remedy fully equal to the i'm
portance of The demand has net hitherto been dis
covered Is believed 10 be- that the subtitle and most
powerful agent by which this scale or incrustat on
may be Tepeled IRON the iron OF the boiler, has
either been entirely overlooked or at least not duly
considered.
1he result Of ofexperiments made by the most com.
petent engineers and scientific men, may br.eay be
summed up as tollows:-
| "Scale, being non-conductor Of heat prevents
the heat impaired to the metallic surface of The
boiler from beng readily taken mp by the water. Re.
liable authorities report lie of scale equal 10 loss
IA per cent of heat in fuel. The plates OF boiler
get hotter tnan the water when II Ia
with them, whatever may be the outside tempera-
ture and the water never gets hotter than $50
deg. under one hundred pounds pressure. can
boiler-plates wsuld therefore last for years; but
when coated with scale, and thus removed from
direct contact with the water, they become so
OVerheated 10 deter0rato in Quantty and quality
This burning out of the bOiler plates is gre It
cause of repair, equal in many instances
TO high as twenty-five per cent, and
from ten to forty per cent. in waste oftuel." But
the most important iast 49, that when the scale gets
thick, and the plates consequently very hot, the
former liable to crack off, and bring the water In
contact with the Ovsr-heated metal, thus causing
sudden and violent action which frequently results
| in destructive explosion and loss of life.
To prevent this formation called ''scae, as we'll
az remove il when 1t has already been formed, our
ntiIncrustator believe will prove itself to be
no less effective its acion than il is simple its
form. AyailnR ourselves of the presencs of an
| agency the existence of which has been fully
proved on the highest scientific authority as exist
ing, we have only to adop, means 10 make this
agency conservative and useful. The An1-Incrasta-
tor placed the steam room Of the boler near
top, where the steam iS as dry possible; and all
mineral atoms, instead of being attracted TO-
PEELED from, the inner OF the boiler and may
be blown out by opening the surface or blow.Off
cock once or t1ice each day. That the means thus
adopted are wonderfully and amply effective in the
| accomplishment Of the end so much TO be desired,
the accompanying testimonials OF those having the
AniiIncrustator in use abundantly prove.
With respect to the cost of making this attachment
| the outlay necessary to place 1t on every boiler
(only one hundred dollars) will afford q profitable
investment, as the following statement OF the ex-
pensos attending the mere opening and partial
cleaning of seven boilers will show. This statement
was given by gentleman in Philadelphia himself a
mill owner. He therefore speaks from experience
"The TACT is, that in opening and shutting up set
Of seven boilers, Tor the purpose Of cleansing or
scaling them properly, by pick or scraper always
very injurious the boierI over the fire. bed alone,
| the estm ate will not be less than as follows
seven boilers, ct S12 .................., S84 on
SeVen gum-rtngs for heads. ds.........,..,..... 100
Engineers wages, six days, AZ $2.,......., IL 90
One eleanaing will cost every six months sloS 90
"or the cost of the usual cleansing In July and
January will be S208."
The abOvO sstimGto does not, however, take into