The workingman's advocate. [volume] (Chicago [Ill.]) 1864-1877, 1867-12-28

81 4uut oelnk uet4yt Ioukur tn&N
&c expected be was unable from want Of
time a avail himsslf Of the o3sk. II him ]
bellows DO working classes hase IN able and
u6l|inc1 (nE sdyoc4es. S,Vt ~
Ireceiyed most sxcellent letter from y.
=. Cary of Ohio, IN answsr 70 Congratulate
~ written byme - correspondence seeretafy
Of the New York Workingnen's Uai6n.
4 hal III selEneE MADE EAoys
HSoaf Fl. aEfh5 ---- sStaf ~ at
= Ram. HAIL AND SNOW. W
rs.x h susssa rsasH s
Enough has been said n the preceding
two articles to illustrate ~ manner il which
Ne atmosphere operates in taking ~ or hll-
Ing itself with water in the shaps % vapcr.
Now start With : few plaSa facts nsesssary
to Be- pnderstood, and We shall zee how ID u
presipitassd, sometimes - dsw, rais, ksit or
saoss; 6rstt here 10 IN the cir shove the snr-
face Of The earth What u called frose lins.
or point n height u which wafer viii be
froBea, at ill times. summss - Well - sin
Ter. or course this point 10 varisbls, lower
in winter and higosr In summer. sonstantly
changing, day By day Or hour By hSur svsn.
This line u Of course further from fhs ground
a. the tropics than q, or near, the poles ;
at the equator or on this oontiusnk . '1tle
to che north Of the equatorial line, ebol q.
itude 10 9 north, whore the tempsrsture IL
ct tho maximum Aaight; thisins1 about
shfSS Hiiss high. From that point itdescsnds
Ia the form Of "a eliptical CIRCLE, touchinR
the grosnd about 60e to 7Oo north. In
this latitude tins imaginary line 10 about
cns snd one-half miles high; Of course be-
fore reaching that height nesriy all the
moisture is frozen ont Of The atmosphere.
The ocean 10 the great receptacle from
whence most Of the rains are drawn. and al
The distance Of few hundred miles from
The shore the temperature Is nearly the same
1t all Sc asons. Here, day BY dag, the sun
draws towards himself vast volunss OF Va
por, the air becomes thoroughly sAturate d
and the vapor invisible in the warm air
near the surface of the ocean, rises towards
the colder regions where the air, parting
with some portion Of its heat, is condemned
Some Of the moisture Is, 90 to speak, squeez-
ed out, and forms dense banks Of heavy
clouds; those driven BY the wind oyer the
land meet colder elements still more OF The
moisture is forced out and it becomes toe
dense and heavy to be long borne up and
falls In copious showers This happens when
ever warm current Of sir, holding water
meets cold and opposing ons. Nov, owing
TO local causes, the air may be very
cafd at the surface Of the earth and
have warmer stratum above it. This warn
stratum, coming from the bosom ofthe mighty
deep, loaded with sapor flowing above The
cold stratum, at the bottom meets another cur
rent which condenses it. bulk Its moisture
ID precipitsssd, as rain falling through thu
cold stratum below, it is frossn, forming
snow; or, perhaps, there may be no cold
stratum below, as we see often where snow
falls sud the weather i 90 warm tbatsi
4slts ~ issfallAs fmssdch case sths yarn
moist current from the ocean hsp met IN
mingled with ons intensely cold, which hA
Ifrozsasthe vspor at Ones. This L The NOR
usual manner Of the snow formation til
\ process first Described Is THAI Ehich@c0m
monty prodacss Aail.
We know that the air being heated, |
rises directly upward, and colder cir rustin,