Green-Mountain freeman. [volume] (Montpelier, Vt.) 1844-1884, 1874-12-23
agricultural.
From the New England Farmer.
Agriculture an Exact Science.

We come 9~3ln 70 the SNb1ect or - A q
riculturr an Exact Science. and will con
slider il in connection with v0ur remarks
that Won c1n hardly conceive how the
farmers Occupation can be carried on with
unvaryin" results until the f,rmcr can
protect himself his animals" &c. These
two points deem sufficient for the present;
and do not ccn- id'r that agriculture as
an pxact : icnce his any thing 10 do with
unvarvin" results. bat rather with variable
results Let me Give Won Il simple illustrl-
ton IF I was to"eR Won nj whit tempora-
trlra water hollis I am inclined to think
vour answer would be that Of ninety mine
out Of every hunAr,1: two hundred and
twelve degrees: whereas It schlOn hollis at
that MONT In ninrtv-ninr cases ont of Il
hundred II hollis either hove or below it
The boiling point of wafer i very variable.
and vet constant: changing with every
change in tine atmosphere. When the at
mneI horic pressure * exactly fifteen
pounds 10 the square inch or when TIL
mercury in the barometer stands ut pre-
ciSclv thirty inches. then water hoiIS 1T
exactly two hundred and twelve degrees:
but if the pressure of the atmosphere is
increased. or. in ohcr words. should Won
find the mcrrurv 90 above thirty inches.
Won will tindthat the boiling point of water
Will be increased in proportion to the in
creased hcirht of the mercury. If the at-
m0sphcrp is 50 rlriiicd that the mercury in
the barometer falls below thirty inches. or.
which i the same thing. the atm0S pheric
pressure i reduced. then watcr bOils ut a
lower tcmrcraturc. the boiling point Of
water beinr determined hv the atmospheric
pressure 1t is ever true to this and AZ
the higher we ascend Il mountain the more
rariicd the atmosphere becomes. so the
lover i the Temperature. ut which water
hOilS: at the foot of the mountain, water
bnils ut one temperature half way up At
another. and ON the top ut another. with Il
never-varyln~ eXlctnesS - to temperature
under the same conditions. and vet with
an cver-vuvinT cXactncSs as conditions
change.
have no doubt Won have heard the old
Indies say that it WAS going to rain. for
their kettles boiled dry very quick: and |
have 10 doubt but the would-be wise have
had many laugh ut the old ladv and her
kettle; but this i ~ GOOD IN Indicator OF
the state Of tine atmosphere rs the falling
Of the mercury in tie barometer. Boiling
Is the formation of steam or v:tpor ut the
bottom of the boiler. in sufficient quantities
TO raise the mas of wntcr and the :tmo>-
phcre. The lighter the atmosphere the
quicker the water i formed into steam
and the sooner the old ladv'S kettle boils
dry: and Il :: light atmosphere i the pre-
cursor Of rain. 50 the old lldv'> kettle is an
indicator of storm. The smoke falling
from the top of the chimney also indicates
u light atmosphere. 80 science teaches
lis, even from these little things. when Il
storm Is approaching. and "ivcs lis warn
ln@ to protect ourselves and or animlls
lhelIhcI ir'tu> !hl'if''9 where science points
me ,n'H' zen, III 'h'' iil"Ih,A!' your cattle
Incl III til' i""' si''lU'if" l'Itct9 OF your
r. i','N our i"l - S'"i m 0''' 100
'.i' 9'Il'N' nom N"'l ''Ii'I" tle e''loia-
!'"'i "l wafer H"Hi your ht'ilt' thr mercury
III e"'.i '''i"'Ii'l'i' H"" VIII Htl' theE All
i ''' o''' ~ t ''.i':n 'o' III 10"
i,i''ie "i 1t lilth thc in'f-
R,, ~ q
r"' We ii'''e io' zone WIN ul'> point Oh
ny "'t'!- II ! i very important sub
!e'ti III" pay very important part III
III inc economy I'll 'ile ;'hlnl'l kIngd"m'
le!a'iil3 pom 10 ourselves 'hd our animals
Now Il N"" '''h' one '"un! "i crushed
Ice' ti,e lem ltra-Uf'. OF which Is -. and 4
Pound OF water nj H., and mix them to-
gtthtr' You VIII ilnd yon have hot water
suHlcIeh' l" dissolve Your lee bat The mean
'tinPrii'u Will not he W, but only -
-l1o h''Ih% h"en absorbed and rendered
latent 10y the iI4Hriactl"n. while, TO con
~ o'I. ";'Ie' INK" steam or V'P"r' ab>"rbs
~: VI it''' 'hl7 i .lI7o i''rht' or not an
oI9''t = sIthr'' III condensation takes
PlilSF, vi !hlS H"I may be satisfied by
+i I,,,a. - >''.'e II ON tne s,"'e "h,
''' anu Pi'''h? IL pom The
PIN " your h''l'i- on VIII ilhd no IN
convenience thrrrfrom till it ceases to boil. .
VIII, when y"n will not b. slow to move it; bu,
.''I- -? Il "'''I"i' 'eiilS burnt by
""' "'''', Dolls a
49, an = i"i me. p'lW en- !
III. s, - 'I' NIUE an" Inc water /
[',,,.,, ,l'a I.'.. . 80" conductor
~ ~ nee TIE n"t,"hh "i The Hottie l. colder !
than the top, but when The steam has G, |
'l'"' ana me nor water = tiles To the .
o''u"lii, 'h'h Inc water Inparts its heat
are wise Won will quickly remov, if
llns law water absorbing heat, in
Passing from Inc lYnld form to Il state OF
'"po.' ht> i,''il siilz'd IN our manufac-
4ieS' l9F n"llIh" purposes IN The dye
iio.'se anu P'Il.'ry' AMI IN heating build
an" d"eAih"S- linus we are Taught
ny 'ill> exact science to protect ourselves
anu our ''lii'l'lS- 1i'Ve Won a ccller which
- .f. u p. "iil your Vegetables 10 freeze +
l. III III i cIslfIh' run y0Hr cave stroughs in o
IT, ana the amount OF heat given ont by the
water IN passing from liquid to a solid !
t = III: VIII 1t eP your Cellar above the
4l'tAlh@ point htmical changes are al
WY WY ',t"ll i'lned by liberation of he t.
,'it' .. 'J''' temperature. Of lnht O.
I' I.Nt taken advantage. and ;
cI,,,I,;. '''' io0u and manufactured our :
W. e. wool.
:. P"t "o'N INTO our stove. and ignite /
IT, ana mere we have 4 chemical opor1tion Y
otn1o.nTero o. '.nu neat; the Oxygen Of the i,
tbn b,lIr 'el 'itcrs INTO combination wi h
yapOr ON w,to,.. :, '"'' HlihS inc {.
carbon. and f,,,,,s , "'.'' win thr J.
,'aao 49,, . ""u iofinS carb"nlc acid: these Il