, 1888-02-22
HANGING A THERMOMETER.


oil the Atmosphere-General Rules.
There are so many erroneous ideas
among persons who keep a thermometer,
as to the lowest temperature during
twenty-four hours, and how to obtain
1t correctly, that q few practical sug-
gestons from one who has for
many years kept n daily record of
temperature by an accurate thermom-
eter that can be depended upon,
will be opportune, and doubtless accept
able Having given no little attention
to the indications of the thermometer
under varying conditions, we feel pre-
pared, after careful and repeated observa-
tions, to offer some instructions for the
benefit of those who may wish more ac-
curately to determine the temperature of
the atmosphere at any time. In the first
place, then, the temperature of the wall
of any building, Mt any hour of the day
or night, is not the temperature of the
circulating air, and is of no use in at
tempts to obtain the exact degree of heat
or cold. a wood wall will radiate its
heat more rapidly than one of brick or
stone, and the man who hangs his ther-
mometer on n wood wall can force the
mercury below another hung against a
hnck wall. The proper way to hang n
thermometer is to surround it with a high
wood frame, covered with Stats, like
shutter work, and rooted over. This
Will protect it from the wind, the direct
rays of the sun. and reflected heat. Run
a light wood bar across the center of
your shelter, to which you can attach
the thermometer, which should always
be when properly exposed, hung by a
conf on the north side of the building,
and at least one foot from all surround
ing objects
If the above directions are carefully
followed we shall not near of SO many
erroneous reports about the temperature,
and the exaggerated statements regard
ing the extreme cold weather will not
find their way into print so often. II
Is not an unusual matter for n news
paper to report 90 or % dogs. below,
when IL or Is dogs. represented the true
temperature of the atmosphere. Such
reports frequently result in doing much
harm and no doubt greatly retard the
growth of many towns or cities through
out n country, as they produce n false
impression among persons abroad re-
GardIng the temperature and climate of
any particular locality. There is n good
deal of truth in the humorous remark of
y tAAAAAhalAoAiC WHICH, WHO ellu. Every
thermometer has its own liar, and the liar
who has the last chance always has the
best instrument. The thermometer that
will rise the highest in summer and fall
the lowest in winter is n Joy forever
The truth is that an absolutely ~accurate
thermometer is a great rarity The nc
cu-acy of this instrument depends en-
tirely o the care given in its manufact-
1rn Tho pvnnnnEg Of fln hnrn ppl tho
size of the bulb are what determine the
accuracy of any thermometer.
II the tube of a thermometer contains
air the mercury frequently divides itself
INFO two or three slender threads, each
separated from the other, and thus the
instrument is rendered useless until the
threads are made to unite. The best way
to accomplish this, il the thermometer is
well made and contains but little air. is
to attach n strong cord 10 the top of tho
instrument (the end by which it is hung
and swing it violently around with n cir
cular motion, when the centrifugal force
will drive the detached portions of
mercury together down into the glass
bulb of the instrument, and the whole
will again be sunitel. When it is re-
quired TO determine the temperature with
the utmost accuracy, and the most re-
liable indications are desired, it is advisa-
bic to employ for the purpose "A ''Chcmi-
cal thermometer'-that is, one having
the scale marked on the glass tube, in
stead of n metal frame, as in ali ordinary
ACKNOWLEDGEMENT, when properly con
structed, such an instrument may be
usually depended upon. The United
States signal service, and most meteor
oloEists, make use OF two kinds of ther.
nometers-the ''dry bulb for temper,
allure, and the 'wet bulb for the .'dew
point, - though the latter is seldom ON.
ployed except for scientific purposes.
In conclusion, the following genera
rules may be given for properly using
thermometer: Before noting the heigh
of the mercurial column, the instrumen
should be allowed to acquire the temper
ature of the medium in which it i
placed, and this, in general will reuuirl
several minutes. To determine the tenn
peraturc of n room, the instrumen
should be freely suspended from nine t.
twelve inches from any neighboring oh
ject, so rs to take the temperature of tn,
atmosphere alone. In determining tn,
temperature of the out door air, the in
strument should be hung some distanc
from any building or tree, sheltere,
from the direct action of the suns rays
and, moreover, it should be protectei
from winds and all currents OF the air
The bulb shoyldbeso placed that it vii
not GSsa against a wooden or metal back
but be free from both the scale and tn,
frame of the instrument, and lastly, il
reading the indications of any thermome
ter, it is very important hat the eye o
the observer should be exactly at tn
same height as the top of the mcrcuria
column, or otherwise an erroneous read
ing is likely TO be madc.-Arthur K
Bartlett in Detroit Free Press.
Good News for the Dude.
When fashion dictates some particula
curl Of the mustnche as the correct thing
H. Il LII l. E--nl = -