The Wenatchee daily world. [volume] (Wenatchee, Wash.) 1905-1971, 1910-10-04
MECHANICAL CONSTRUCTION
OF the Howard Draft Arrangement

rdll Arrangement
these gases which are ordinarily
wasted through the chimney.
Again the Burning of this "A per
cent of carbon presents very. inter-
esting though somewhat complicated
problem in connection with coal COM
bustion. Carbon and oxygen under
proper conditions unite into one
chemical compound, and the process
Of this chemical union is what Pro-
duces the Heat We Get from fire.
These two elements unite in two
different ways as follows:
FIRST: One part of carbon uni
ties with two equal parts of oxygen,
the resulting gas being carbonic acid
gas, and 1850 HEAT UNITS RE-
SUIT FROM THE CHEMICAL PRO
CESS FOR EVERY POUND OF
CARBON CONSUMED. CA heat un-
it is the amount of heat required to
raise a pound of water one degree
in temperature.) The gas produced
is incapable of any further burning
complete But complete combustion
Is accomplished only in the most in
tense heat, and in the stove or fur
mace perhaps a far greater portion
of the fuel is consumed in accord
ance with the following principle:
SECOND. One part of carbon
unites with one part of Oxygen, the
resulting gas being carbonic oxide
gas, and only 4,450 heat units per
pound of coal results from this
chemical process. This process does
not represent complete combustion,
for the carbonic oxide gas, which
usually escapes through the pipe, is
capable of further burning, and if
brought into contact with free oxy-
gen at high temperature a second
chemical process takes place, more
OXYGEN is added, the carbonic OK
ide gas is changed to carbonic acid
gas, AND 1925 ADDITIONAL HEAT
UNITS ARE PRODUCED. In the
ordinary straight draft stoves. this
last named process of burning can
not take place and for obvious rea
sons. FIRST, they have no possible
means of supplying FREE OXYGEN
above the fire, AND SECONDLY, the
natural movement of their drafts
tend to aid the immediate escape of
the unconsumed gas.
Herein lies further advantage
of the Howard Stove, for our hot
overdraft supplies the needed oxygen
at the proper temperature. and our
diaphragm damper tends to stay the
escape of the gases sufficiently to
permit this last process of burning,
whereby the possible heating power
of this portion of the fuel is prac-
tically doubled.
THE FOREGOING FACTS enable
us to comprehend the claim made by
scientific men. to the effect, that by
the ordinary method of coal con-
sumption, at least rs PER CENT of
the heating power of coal is wasted.
IN THIS 15 PER CENT OF THE
| WASTAGE lies a broad field for the
exercise of economy in fuel, and if
the HOWARD STOVE SAVED ONLY
lONE-HALF of what the ordinary
stoves waste, its heating capacity
from a given amount of coal would
be more than DOUBLE THEIRS.
WHY THE HOWARD STOVE
WARNS THE FLOOR.
One of our statesmen said: Il
! sometimes meet, with man who is
wholly swallowed up by the idea,
that Heat goes up" This man. APP
parently. has observed only one of
the three ways in which heat is
| transferred.
kettle rises because the heat has
made it lighter than the cooler wa
ter above. Heated air rises to the
| top of the room for the same rea-
sons. but radiated heat moves in
straight lines at right angles to the
heated surface. Thus, it is that the
Towards Inverted Conical Base does
warm the floor, and it will come
nearer warming the floor all over
than anything else built in the shape
of a stove.
Don't overlook the fact that a
stove that burns both wood and coal
is really the only stove for this coun-
II try. The Howard is that stove.