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How should an idle boiler be encased?
It should have three jackets: A heavy inner one of black
sheet iron, a middle jacket of pure asbestos, and an outer one of
galvanized iron, separated by an inch and a half air space from
the inner jacket.
Will these three jackets keep in the heat successfully?
Yes, almost entirely. The outer galvanized iron jacket should
rarely be so warm but that you may comfortly rest your
hand
on it.
How much heat would be wasted in the cellar without such
jackets?
Sufficient to warm three ordinary good sized rooms.
Then why are n’t all portable boilers supplied with them ?
Because they add to the cost of the boiler, and unless attention
was called to their omission, many people would not know that
they were desirable.
Which style of boiler is usually preferred ?
For office and residence heating the “Portable” style. For
larger work such as halls, theatres, churches, large greenhouses,
etc., the “Brick-set” style.
How can you have a cool smoke pipe ?
By making the boiler into a “Base Heater,” so that all the
smoke before passing into the chimney is drawn down to the bot-
tom of the boiler in the rear and thereby comes in contact with a
great deal of water surface before it enters the chimney.
Moreover, this last water it comes in contact with is the cool
return water, and so very rapidly absorbs heat from the smoke
and reduces its temperature.
What do you mean by a “Combination System” of steam and
hot water?
A system by which you can at pleasure warm your house by
either steam or hot-water, simply opening a valve to draw down
the water to the proper level when you wish to use steam, and
filling up the boiler and radiators again, by opening another
valve, when you wish to run as hot water. Hot-water is intend-
ed to be used during spring and fall, and steam during zero
weather.
How do the various systems range in price ?
The cheapest is steam, then comes the “combination” and then
hot-water. The price of the boiler alone, however, in each case
is practically the same.
Are there other points to consider before deciding what boiler
I shall buy ?
Yes, many; for instance, the ease of cleaning from clinkers or
dust, the ease of
regulating, whether the boiler is sufficiently low
in height to go into a low cellar, whether it can be taken apart to
go through narrow doors or passages, whether it is a “Base Burn-
er,” whether it is a self-feeder” or a “surface burner,” whether
it will prove durable and not need constant repairs, and whether
it is simple enough “to run itself” so that any ordinary servant
can take care of it with safety.
SUGGESTIONS ABOUT RADIATORS.
There are prehaps half a dozen different styles of first-class
Radiators now on the
market, any of which are likely to give
satisfaction if they are generously used so as to easily and com-
fortably warm your house. One of the most common sources of
trouble wherever work is let by contract to the “lowest bidder,”
is that of
insufficient radiation, the contractor taking his chances
on a mild winter or his power of persuading you that he has
given you enough. The larger your radiators the easier and
quicker are your rooms warmed, especially so on a cold winter’s
morning.
The best plan is to have a distinct
understanding with your
steam fitter as to the exact number of square feet of radiation he
will put in each room, and be sure and have your front hall well
heated in any event, for a warm hall goes a long way towards a
comfortable house.
ADDITIONAL
SUGGESTIONS.
Valves.—Use only the best, full-opening, angle valves, with
Jenkin’s disc, nickel-plated all over, rough body, wood wheels,
with unions. It is economy in the end to use only first-class
valves.
Have plenty of boiler power, so that you will not be
obliged to
crowd your boiler in severe weather. The most successful and
economically running jobs have ample boiler and radiator
capacity.
Wherever pipes run through walls, floors or
ceilings, use
nickel-plated or cast-iron (bronzed) plates to give a neat finish.
In calling your attention to the Norris Sash Balance and Nor-
ris Pulley, we wi 1 say that the Norris Pulleys are well and favor-
ably know over the entire country. There are but a few, if any,
architects in this country or Canada
that do not prefer the Norris pulleys
to any other pulley made. They are
known to be the only pulleys made
that do not depend upon screws to
hold them in position; the pin being
back of the bevel on the lower end of
the pulley, causes both the sash and
weights to pull back, hence the
heavier the weight the more firmly
they imbed themselves into the frame.
Norris & Co. manufacture pulleys
of a 1 sizes and in all the known differ-
ent finishes. They take great pride in
keeping up their well deserved repu-
tation. Their common cheap pulleys
are far superior to other pulleys mark-
ed noiseless. They have recently put
on tlie market a full fine of there pul-
leys made for ribbon, and we under-
stand that they propose to keep up
their Ribbon Pulleys to the same high
standard as their Rope and Chain-
Wheel Pulleys. They have also put
on the market a superior grade of
Aluminum Bronze Ribbon and Gal-
vanized Steel Ribbon, at prices within
the reach of all. They claim that
their ribbon catches are the only posi-
tive holding catch made that does not
impair the strength of the ribbon at
any point. Their catches do not de-
pend upon a wedge that is so liable to
draw out before becoming tightened,
as is especially the case with Alu-
minum Ribbon, which has a smooth
oily surface. So little accurate infor-
mation has been published in regard
to this new meta\ that the following
description will be of interest. In
color pure a'uminum is a beautiful
white, with more of a bluish tint than
silver; it takes as high a polish as sil-
ver and retains the polish, not being
affected by moisture or exposure to the gases of the atmosphere.
In strength the cast meta’ has about 14 tons tensile strength to
the square inch. The mixture that Norris & 00. use for their
ribbon has a tensile strength of over 50 tons to the square inch.
In conclusion we will say that in our opinion Norris & Co. have
succeeded in obtaining what their large interests over this coun-
try demand, the best pulleys, ribbons and catches that can be
produced in the world. Write C Sidney Norris, Baltimore, Md.,
for samples, as we have done, and you will be convinced that
they have what the public demands.—
From the American
Builder,
April, 1892.
I take great pleasure in announcing to you the comp’etion of
my five new large furnaces, which, added to my previously in-
creased facilities for bending and beveling glass in the most skill-
ful and workman-like manner, enables me to handle all work in
a more expeditious and satisfactory manner, which cannot but
prove very gratifying to the trade.
Having now the advantage of new, improved and superior
facilities over the old method of bending and beveling, I am pre-
pared to bend and bevel glass for coaches, hearses, sho\V
cases,
steamboats, offices, banks, railway cars, clocks, lamps, bow win-
dows and large bent plates for store fronts, etc.
We also carry in stock all sizes of the best selected crystal
plates; also 3-16 plates for carriages ; also selected mirror plates,
plain and beveled, for the furniture trade.
Orders respectfully solicited and promptly executed on the
most reasonable terms.
Earnestly soliciting a share of your patronage, I remain,
Very respectfully yours, M. A. Smith.
Newark, N. J., July 1.
An ethical study on

Veracity,” by Herbert Spencer, will be
among the contents of the August Popular Science
Monthly,
252 THE SOUTHERN ARCHITECT.

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