The enquirer. [volume] (Richmond, Va.) 1804-1815, 1805-04-16

e,
and thofr which make no feniible impreflion on
our organs of hearing. II the ear were 70 con-
hru6ted that could hear all the motions
which take place in the air, we ihouli, b fun
ned with the noiie and ii our eyes were 10 con-
ltru6ted as 10 fee all the rays which are emitted
continually, by day and by night, by the bodies
which funounded US, we fhou!d be dazzled and
coniounded by that iniupportable food of light
poured in upon Us on every tide."
! This interchangeable eSperimentalif, taking for
granted that thefe inviIible radiatons exit, EN-
deavours, hy train threatening, iiluitrated with
uudeniabie facts, to ditcover the cauies OF ap-
! pearances which have hitherto been enveloped
| in obtcurity. 1t is not in our power Ia follow
him here, il will be fu!ficient if we lay before
The reader the feverai dedu6ticus which are cal
culated for general utility: fome Of theie may
be eaiily verified with no great expence of time
or money.
| In all cafes where it is defgned TO 6reyc,4e f5e
! beal of any iu5fance which is confined in me-
talc veiiel, It will contribute to that end, if the
external ilrtaCe of the vet!rl be clean and bright
But if the otjet be to cool any thing quickly, in
a metallic veHel, its external fUrface ihould be
-. painted, or covered with fi5ftances which have
! been found TO emit calortic rays in great album
dance.
| Pollhed tea urns may be kept boiling with
much iesexpence OF piri! Of wine than fuch asare
varniihed; and the cleaner & brighter the diioes,
andcovers for diites, which are uied for bringing
| vicina!s to table, and TOR keeping il hot, the
more efeSually will they anfvcr that purpofe.
! Saucepans, and other kitchen uteniis, which
are very clean and bright on the outfde, NAV be
! kept hot with f.nalier fire, than fuch as are
black and dirty; bat the Bottom Of faucepan
| or boiler thould be blackened, in order that its
! contents may be made to boil quickly, and with
4 ima'l expence of fuel.
| When kitchen uteniils are ufed over fire of
iea-coal, or of wood, there will be no neceiiity
for biacAening their bottoms, for they will
toon be made black by the flnoke; but, when
! they are ufed over clear fire of charcoal, they
/ ihould be blackened with the fmoke of lamp.
or coal-fre.
! Il has been thought brewers fats would an
iwer the purpofe of cooling liquors better, if
made or metal, than of wood bat metallic
iurface is i'll calculated for expeditne the emf
lion OF calorihc rays. The thickness of the
timber Of which theic tubs are commonly made,
| is favourable TO ipeedy cooling of the wort !:
for when they are empty and cold, great part
OF the heat of the iiqucr is abfordedby the wood.
Where metallic tubes filled with team are
uied Tor warming rooms, the external furface of
them ihoud 6e painted, or covered with fome
fubfance which facilitates the eniilion of cal
orihc rays. 4 covering of thin paper will an
| liver the pnrpoie very well, if it be black, and
cioiey attached TO the furface ofth metal with
glue.
Tubes deGgned for couueyine hot team from
! one place to another, sl,ould be covered I'D with
a eOar~g covering, or fhouid be kept clean and
bright 1t might be worth while to gid them or
| to cover them with gilt paper, or tin foil, or
! fone other metallic filhtance which docs not
eafily tarniih with the air. The cylinders and
principal iteam-tubes of lfeam-engines might be
covered, frlt withfome warm cloathinp and then
with iheet-brats, kept clean and bright. The
expence OF this covering would be repaid By
faving of fuel.
| IF garden walls, painted black, acouire heat
/ fafter, when eXpoted to the fun'S direct rays,
they will likewife cool fafter during the NIGHT,
and gardeners mutt bet determine whether thefe
changes OF temperature are, or arenot favourable
! TO fruit trees.
Black clothes are known to be warm in the fun
:hey are farfrom being fointhe ihade, efpecial
/ lyincoldweather. Nocoloured clotlIingisfoc
as black, when the temperature of the air is be-
low that of the furface ofthe fkin, and when the
bodyis not eXpofed 10 the action of caorific RAYS
| from other fubRances.
| The warmth of clothing depends much on
the poijb of the furface the fubfance of which
| II is made; hence, in chooling winter garments
thofe dyes are to be avoided which tend mott to
deftroy that poif and as white furface re-
poifhed, of any other colour, there is reaion to
think that white garments are warmer than any
other, in cold weather. They are universally
conidered as the cooleft that can be worn in
very hot weather, aud Especially when perfon
is expo!ed to the direct rays of the fun; and if
they are well calculated TO reflect calorfc rays
in iummer, they mutt be equally well caicuIat-
ed to reflect thofe frigorifc rays by which we are
cooled and annoyed in winter.
Garments of fur are warmer, in cold weather,
when worn with the hair outwards, than when
it is turned inWardS. Is not this proof that we
are kept warm by our clothing, not 70 much by
contining our heat, as by keeping off thofe fri
gorlfo rays which tend to cool us? The fine fur
of BEATS, being highly po!hed fubaance, is
calculated TO reflect thoie rays which fall on It
and ifthe body he kept warm, by the rays which
proceed from it being reflected back upon it,
fur garment would be warmelt when worn with
the hair inwards but if it be by refettiDg and
turning away the frieorific rays from external
and colder bodies, that we are kept warm by
our clothes, we might expect that apeiiTc would
be warmef when worn with the hair outwards,
as The Count fays, in fact, it is.
The fur Of fevera delicate animals becomes
white in winter, in cold countries and that of
bears which inhabit the polar regions, is white
i'll all feafous. Theft lah are expofcd alternate
", IN the open air, to the moi intenie cold, and
n he IS