The People's vindicator. [volume] (Natchitoches, La.) 1874-1883, 1881-09-03

cry q % deg u Is dsg.r' This 3 h
Question asked By . correspondent III
On sssssviag esra q Mind. ana 10 relc
@svo dasss - cxemplilyiuR What |
0saas. 1hs,e ore the i?th aSd iIth ,
July, which We clearly rsmemb,
~ N their relative comfort and di.c,n
sot. We might reply b him bried
srn Tho 'hcrm1mct~r dos not tell q
the ';osy as.oshs "bcsrsbilisy" Of hsaI
o'her things come Ia 10 amelIoratc or ,
aSgTsyaie tho temperature a bresse a
quantity ol moisture In the air. .l,als
uy. humidity" however, ~ you find |
~ the weather reports. Il The srcs
he'per or the great offender. Il l. lea
comfortable on ho, mois, day than Of
. hotter dry day.
On Tuesday, July Il, the first Of N,
days mentioned. the maximum temper
A:a,rs "a, the Signal Oiiicc) was " deg
And The relative humidity Tor m ,is,ur,
In zoe sir) ranged from q. 10 100 pe,
cent. with an effect by no means pleas
AT. IL Ms q sultry, "muyyy" dsy
while IN Thursday. the 18th, the Their.
munster rising 70 . much higher poin,
gu dex.) than on the i?,h, the IN,
nidiiy was much lower, ranging from
~ 10 u per cent. only, leaving the heat
much more endurable. This latter dsy
Gus IN fact . remarkably pleasant day,
though over ten deg. hotter than Tie
Sormer. and this Vas not due 70 .
stronger breeze. a Tie Signal Service
ancmomcter (wind mcasurer) registered
thc same velocity Of the winds-from
Soar to ten miles an hour on 10th day..
The sensible difference In the two DAYS.
- respects the cosniUrt u the body Ia.
theseeoees traceabls 10 The great humid
~ OF he air on the 18th and the smaller
degree OF moisture on the 18th.
The term "rclativc humidity" or
ham'dity,"i II Is true, does not refer TO
the absolute quantity Of moisture in the
ar. In the language Of metoorologists,
The term (" humidity" denotes the do.
gree 81 iss approach 70 sa.ura,ion In the
AIR Tor containing Is much IS Il can
hold. It expresses the proportion
which the amount Of vapor actually
present In the cir bears to tina, amount
which the cir would hold II il was al the
p',int Of saturation- when dew, mist or
rain y about 70 fall from II. When the
humidity Is recorded IS 100, the air IL
completely saturated with moisture and
rain Is imminent, but II reported At rs
II contains only three.fourths OF the
amount squis'te for saturstion. For.
tunately for Philadelphians, the average
humidiv Of the air here year In and wear
on: % under IS, and We are excmp. from
the sultry climate OF many places lyinc
even in higher attitudes.
!, Is Of great importance for those
~hs would profit BY the daily Siensi.
service reports to bear In mind the sig.
n'hcance OF It's "humidity" column.
especially In the so-cslled "doe dsys."
The warmer th, cir Is the larger be.
comes the quantity Of invisible yspor Il
Is capable Of sustaining and storing
away in the intersticeS between its
atoms. AT the freezing point II can only |
hold one one.hundrcdth part Of its own |
weight Of invisible vapor; u the tam. |
Perature Of % deg, one. eightieth part Of |
it, weight; at s. deg, one. fortieth mart
and Tor every addition Of q dee. Of
..snPseaanrs " capacity Is doubled. II
!ully saturated At 80 deg. OF tempers. |
lore IL contains 2.S7 grains OF aqueous
ssPor per cubic foot; ct GO deg. 6.S7
grams IN each cubic foot, and st 80 dec.
?! ~ toermometcr 1881 grains. A iii |
= temperature from 50 deg. 70 GO dec
lhrows down therefore nearly s Grains
y weies Tor every cubic foot Of air thus
sailsd. 4 cubic loot q saturated ar
lnder average pressure ard Q tempera.
'ase o. 70 deg. weighs 495 grains (Troyl.
y wAGa N.S grains are pure aQueous
'spof.A With TIE tenn perature yerpin0
~ iOO deg - IL sometimes docs In our
waaee waves" the atmosphere. n
'ssorason, contains Is much Is IS 81
yraaos q water 10 the cubic foot. from
mich some idea may be gathered Of
~ enormous rain fsll poeSibilities NJ
fopical clouds, which. heated nm n.
Cctly under The fierce sun. ere renleta
''sA evaporation from equatorial sess.
A these watery particles offer resist.
nee 70 the heat Of both the earth Ana ,
W beneath them. which Il seekins n
scaPs oy radiation into the upper Of.
sosphers. they thus efiectually preyent
D cooling OF the coil and Of he lover
SIM sera&a. While the s.relstive I'm.
nidfy" data In 10 Weather Huresn I
'al'sesas do not give tie sbsoluts
ooone Of vapor In tho cir, nsverthe.
- when ths percsntagss givea ere
-. OF uear 100, they skov IN m q
lo'ecuIes q vspof are coalescine ovsr
20. and arc forming With IL ar q
IONS . canopy above a. vhioh intsr. {
spS - heat q Tho earth In - a&temnt Q
D INTO u clouds. The vapor NJ. .
~ 40 pseveats 10 body itom throv. =
Is Ell eAfA cumuAtaye temperatnre 2
~ eagsadsred n our midsummer 4
49,. 9 - upea several circum. 3
80. Evaporaaion from tie IN d
=. naes y pssaaPs ~ most imnor. q
eaas - body be- q reducing In 4
- = y. Max Won 49,. .
.xsssSe eoissat 9unieA hykleoiGE 9
= ,s z ~. g: a q spPsrasss 4
. ~s1ng u quaatiey a water evsn. Q
saed y msa aad aainals. Hb ON. 4
eeeo demoaatRats that - ~ ~ o
- eeoss about two pounds DIV dsris~ Q
Voo4soo0e hoQsa. ~ a a As s1H.SI n
o. ar aa1s kak possds a ~ !,
z - lset ianasoo. = a - .ssss.: q
zig ealorle units; d u 1921 n xso d
'ato leave tAs body & oeassossss" Il q
seoeaa1ea." - y loecl6(y IN: J
~ ~ \. j. eaa.s bow e ca b thaf a.
- aasdee work our Hood I'M ~
49, Wer0ee, bat sometimes evsr
-, - vlae powerful neens a :.
onng or body 70 han, d ~ IN. y
- g Or p6eiphsric eisculetio.. !" =.
n: 1900 q tyeasy while ascssiInx !.