The farmer and mechanic. [volume] (Raleigh, N.C.) 18??-19??, 1911-02-21

,,,r Governed largely by the propoe
ton of lime to acid .on-
n, xture and by the mechahi
dition of the mixture. -.,ent
when lime is added TO Peii err no
nos,nrec and meadows it shouio ~.
applied broadcast in the IT, For
winter and left on the suriaoe nm
this nurpose the carbonate loTiH Wa"
usually be found best su tea
Forms of Lime and Their EQulsaioif
There are three chemical forms o.
lime used commercially other no. ~
evDsrm Gland plaster) or sulp1!d'o =,
lime Each Of these forms are hhoMli
49, o ooodlv number of names. II
forms and synonymous names aie d
~ Caustic. quick, burnt, builders
ROCK, stone or unSlaked lime.
(2) Carbonate, agricultural, mar
BILE. limestone, mari or alr-slakeu,
60 Water-slaked or nsolateu -
AS all three of these forms OF Irhe
are suited for agricultural purposes
= becomes important in p~urchaslng
to know the relative equivalents III
actual lime Calcium oxlde). Wnen
IFS pounds of a good grade of car
Donate of lime is burnt IN the KIN
about 100 pounds Of quick or caust,c
lime is secured, the remain ing 20
pounds of the original substance is
driven off into the atmosphere as car.
bon dioxide or carboni acid gas. IL
the above 100 pounds Of quick lime,
secured by burning, is pos 70 tne
atmosphere for some time 1t Will aD-
sorb carbon diOxide agar from the
air. and will. when fully saturated with
it. weigh IT'S pounds. If So pounds
of the burnt or quick lime is water
siaked With just enough water TO com
plete the chemical change, the re-
sulting hydrated or Water-slaked lime
will weigh about "A pounds. In other
words, 100 pounds Of quick llme VIII
take up in chemical combination about
80 pounds of water, thereby increas-
ing it's We5 about one-thlrd by
understanding.
From the above it may be seen
that the most concentrated form of
lime is the caustic or burnt lime. ThlS
being so, where the lime has TO pc
freighted long distances on the rail
road or hauled several miles on coun-
try roads. or both. It will usually be
found that his will be a cheaper form
n which to buy lime. but not always.
For instance. the freight on a car
load Of lime agricultural lime so
called) will be the same as that on
the same amount of quick or burnt
lime, yet there would be almost twice
as much actual lime (calG UNI Oxide)
IN the latter as in the former, hence
the freight on the line contained in
the quick form would be only about
one-half Of what the actual lime con-
tanned IN the carbonate form costs pei
ton.
In securing quotations on lime do
50 pon percentage con1posit on Of
calcium kid and upon delivery at
your nearest railroad station. If they
are secured in this way it will not
be difficult to decide from whom to
purchase. If these precautions are
not observed it will not always be
easy to dec de which will be the
cheapest source from which to secure
ones supply Of lime. One bushel Of
good stone or rock lime will weigh
about SO pounds. and when slaked will
produce about three bushels Of slaked
lime, which will weigh approximately
IS pounds per bushel.
Pure burnt oyster-shell lime weighs
about so pounds to the bushel. When
it is slaked about two and one-half
of slaked line is formed.
which will weigh abou 40 pounds per
busheI.
c.. 3. WILLIAMS,
Director Agricultural Experiment
Station.
TEHJt nN- vNITD ~