The Virginian. [volume] (Lynchburg [Va.]) 1822-1829, 1828-09-04
AGlssCEJt.TtEE,

He'd aud LtIdt-Extracfed tiom Lauuon'
Encyclopedia ot Gardening.
The brdt OF The sun Is thu cause II growth
ant rs II aht the cause Of hainruy, "a tue 7ra.
elnbe kingdom. I lis IS universal, arknn.>.
legged animals VIII I've without or with We.
- little lights but 10 plaut3 uhaicvcr
Isl tor any lime without The prr.rnce al ihi,
element The ogeneY ofelectue,v in pients
Is less knoWn.
1wn opinions ne curreri respecting lie
nature Of heat. BY -omr phi'o.cph,i, II IS
ranGrive5 to hra peculiar subtle anl1, Of
which The particles r,'ppl each u,l,rr bgt hay.
It stront attraction Tor the PARTICLES oi other
matter. BY others u Is con 5jdereti as a mo-
ton or vibration Of the PARTICLES of matter
Which IS supposed 10 di ff,Finy"Iocity in dlile.
ren' cases, and thus 10 produce the different
degrees Of Temperature.
Whatever decision be ultimately made re-
Speeding these oIin,ons, lis certain hat there
Is na'ter moving III tie space between Is aud
lie heavenly bodies capsbe of commute.
'iHE heat, the motions Of which are leetdi
ural TIM the soiaI rays pfodHCe heat IL ret
M nPpn The surface al fhr earth. The heau-
tiful strr mcuts Il Dr.. lIerChrI have shown
taat thefe are lays tran mtied from the sun
81 hich 10 rot illuminate aud winch vel pro-
luce morr heat han the visible ray aadlt-
lee aud Dr. Noll,,.on have shown thai lhrta
are other Invisible rays distinguished by lhrir
chsmiral effects.
IIeaf,i rHdielrd by thesnn TO the earth, md
il sutlt rcd 10 accumulate, nr. Wells observes,
would qnickly destroy HE present cOustilu-
tnhon 0i uurE 'ubr.
This evil Is prevented by the radaion of
heat trpu, fi,t earth - thr heavens, during lhe
night. nhrn 1t teCeiges IRON ,hen little ar No
At.at III rriurn.
But, through lhs wise economy Of means,
Which is Witnessed IN all the operations Of
mature. the prrvcntinn Of this eyil Is made the
source al great positive good, For the SUI
lare Of The earth, having become colder than
The ne,ghborlug ar, eeadcuse~ part oil lie
wntery yapour ct ibe atmosphere into dew,
tn utility of which is lao manifest to ronuire
eluridaion. 1 his tloid appears chiefly where
il Is most wanted. on heritage aud luw pants,
avoiding, IN agrrm measure rnck., bare eallb,
and cansidpraI le MASSES d water
Is oroductan, too. tend, 10 IRE vcnt the IN
Jury that might arise rem lis own canse ;
since the cipitatien al water upon tbe teu.
Ter parts of piauts, mnst lessru the cold n
them. which occasions il. The prevention.
either wholly or in pnrt. of cold, from radia-
lion, in snbsIancrs on lie ground by the in.
terpasiioH OF cay solid body between them
aud the sky, arises in the following manner /:
Tie lower body ra3lates is heat upwards, as
If no other iutcrvenrd between At and the
skv but the loss. " hich il hence suffers !,
more or less compensated by what IS radiaied
10 il from the body above, the undtr surface
Of which possesses always the same, or very
nearly thr satCe temperature as the air The
manner in which clouds prevent. or occasion
10 be small the appearance OF "A cold Al night.
upon the suiare OF the earth, IS by radiaiirg
heat To the eRrh, in return for that which
they intercept IN is progress from the earth
towards the heavens For although ppuntLe
sky becoming ouddenly riopdy diving u calm
night, n naked thprm amefer, suspended Ia he
air commonly rises two or Ntpe degrees
little OF Ills rise IS 10 be attributed TO the heat
evolved hV the condensation rf wnterv yauonr
! in the atmosphere tor the heat % eAtriGated
must soon be disstpated whereas the effect
of greatly les.eting or preventing alto
gether, The Appearance of superior cid On
the earth TO that OF the air viii be produced
! by cloudy sky, during the Whole Of long
! night.
Dense clouds, near the eaih reflect back
/ the heat they cetYe from il by radiation. Bot
/ similarly dense clouds, IL high, Though they q.
qualify intercept the communication # the
earth with ;be sky, yet being from tber ele.
waited situation, colder than the earth. y Ill ra
! diate 10 il less than they receive from IT, aud
may, consequently. admit Of bodiss on is sur
| lace becoming several degrees colder thanth,
air Islands aud parts OF continents ciosr Il
! he sen, being, by their siiuatiun, subject To
cloudy sky. viii rom tie smaller quantity o
heat ps by them through radiation To thr
heavens, al nish'. IN addition 10 the reasons