The workingman's advocate. [volume] (Chicago [Ill.]) 1864-1877, 1875-10-23
FROM ILLINOIS.


In your issue Of Sept. 18th, notice in a
letter from Mr. Hague, that he wishes me
W remember the argument, and not devl-
a.e from the point Tie would have
showed more wisdom by first trying to
pluck the beam out ii " his own eye tie
writes as heat is applied "a the air az the
bottom Of the upcast; II does nothing
but rarity it. | believe With him exactly
that an the heat does is tu rarity tie air ii
.he upcast, then comes the query Does
the rarihed air in the up-cast fly upwards
of its own accord, thereby causing a cIrcu-
lation II air, or Is It propelled if propelled,
Dy what power Mr. Hague says az is
simply the different density Of the two
columns of air III upcast and downcast
shafts, that causes the circulation of air IN
shafts / would say that the rarIhed AIR IN
the upcast Is propelled by the superior
weight Or pressure Of the atmospher, not
SIMPLY thssuperlor weight OF the atmosphere
ID the downcast shaft, but the external as
sistance of the atmospheric weight Or press
ure is brought into continual requisitlon
IN propellIng the rarIhed air out Of the up
cast shaft, as fast az the furnace rarihes IL,
III reby causing circulation II air. The
pre- 5sureof the denser atmosphere will press
the lighter air upwards every time. Again,
Mr. Hague writes " As the heat in
creases the density dIminishes, but the
pressure remains the same. Now would
say, As the heat increases, the density and
,reight, also III the upcast l. diminished,
and the pressure of course diminished &C
cprdIngly. If the pressure remains the
that the weight viii remain the same also.
Then query, where would the balance Of
power come from to cause a circulation 20
air. As u being at fault III using the word
pressure, permit me to inform Mr.. Hague
that lecturers and writers use the words
press, pressed and pressure, very tre-
quently, when describing the nature Of the
atmosphere also permit me to quote an
otherof Mr.. Hague sllentlhcTolnts. From
a letter Of his, dated Feb. 10, he writes
My experience teaches me that the hot
ter the day, the more rapid the air travels
from the higher opening to the lower one
Of those Hill Side mines around Plttsburg,
and the same cause produces the same eff
fleets iu all ages, and places Of the world
That Mt Hague might learn to his profit
how rapidly the air travels from the higher
opening to the lower one in other places
0f the world. | viii submit for his care
ul perusal, a few out Of many expert
ments made with a Thermometer. One was
at the New Rutland mines, on the 3Oth
day of August, 1873. The temperature
inside Of the mine was 80 degrees and
outside Of the mine 1t was 80 degrees. On
the same day there was complete stagna-
tIOn Of air iii the NINE Again, on the Fl
day Of Sept, 1879, the temperature inside
Of the same mine vas a. degrees, and out
side it was 81 degrees, showing again a
complete stagnation Of the air currents.
Another test was made at Muouk shaft, on
the 18th day Of July, 1879; the temperature
inside the mine was SO degrees, ana outside
was 90 degrees, with the air currents al
a complete stagnatlon at the same time.
The above Witnessed experiments speak
louder than mere assertions. and goes to
prove conclusively, that Mr. Hague theory
j. wrong, when he says, that. when the
Air Id the mine Il colder than the air out
side, the AR viii 60 down the shaft, that
rs highest on t,F. ana not stagnate-
have grave doubts whether Mr. Hague VIII
ansR III the simple question, VIZ II there
Is a stagnatIon Of air IN the mines, with
and 96 degrees outside. how much hotter
has it got to be outside before that rapid
travelling Of the air begins 70 tab, plao,
from the higher opening % the lower "ue.
that he pirates SO much about As "a trying
to change the height Of the atmosphere. Ia
order 70 get more pressure On the upcast
shaft, permit me to say 70 W. II that /
don't want more pressure on top Of the
uPcast, my theory Is to lessen the press
ure on top Of the upcast, and not increase
it. | can tell him how to 40 that. II the
information Will do him a benefit. But
don't know any thing about making the
atmosphere shorter or taller.
ID. Mod