Virginia free press. (Charlestown, Va. [W. Va.]) 1832-1916, 1839-06-20
. o ~ ~ y 81 y 6 a 20 81


TOR THE FREE Pass
MEssRs. GALLsHER The following facts
with regard To the limestone of this section OF the
Valley orVITgInia, deduccd from Professor Wa
IT, Ro0ERs' Report Of the progress Of the Geo
logical Survey Of the State Of Virginia for the
year 1888, made TO the General Assembly dur
ing the last session, (is39,) are most of them Of
81 much practical - aluc, and all OF them OF 80
much importance. N my opinion as 20 eniitle
them 10 place IN your paper which the interest
you have always manifested IA matters of both
practical and speculative science, will no doubt
readily cOnccdc to them
FAcT l. That there are two varieties Of the
limestone found m this region of the Valley as
we'll a Throughout the whole Valley, which are
peculiarly rch IN lime. namely,
The dark blue limestone Of fine gram and
smooth fracture" which yie.ds on burning "a
brdiuiifHiiy rAifs hms>"
The dun coloure 3 limestone, very close gram
and rounded fracture" winch on being burnt
y.~idsa ltinr equally far aud rather puTefn than
tie dark bine limestone.
The fmc from these varieties are well
suited fof tn, pafpU,, of ordinary mortar" but
VIII nor ST under water, (SIil not form the IIy-
drauilc cemrhtl
. That ihe lime best calculated TO set under
water. 90 10 other wurls to form the Hydraulic
cement. - that lime which % contained ~ rocks
containing "a large proportion ot C1Tbunat Of
rsiyncsia along wi,h the carbonat Of llne."
That lmcsf0ncs. confaising ihis mlgne-
~, and consequently capable, when burnt. Of
forming The liydfauiic cement, are abundant n
tii, section ~ the Valley.
> That the limestone, containing thi, large
proportion oi magn~s.a. AMI " course useful iu
forming lime iof the Hydraulic cement. inay o.
known and Distinguished from Other varieties Of
limestone. bv these appearance. w; Blush
gfey unt ffr4urnny blended viih a ungc Of yell
iow % brown. du'iDr,. oi surface. vben freshly
broarn, absence 81 the smooth gram Of The
pure varieties Of limestone. AMI tendency TO-
ths slaty structure. aui also by ihc action at
diluted SIiphufic aclt "a thr stone reduced So
pHsie The result bcine. % u 1gnesia be- present
crystals 81 Suiphaf of Magncsia of Epson Sale
Thstthc same MagncS.an Lame stone. ~ hirh
L1s yis.isi such immense qualiii.-s of valuable
'sment oa the Potomac near shephefi.tawn.
'fients 90 a "S1uthWari" Direction from that
r.fcs. AID "passes very near he WALLACE 81
LAsglcstowH ahd Hiiluood.'
= fbatan elimination n specimen u lime
stone from Egcits Ran, % miles from CHARLIE
tom, D." showed 10 "a coutsta the same ingredients
necessary fof The setting under water or forma-
ton q Ilgduuhc cement. which ihs limestone
o. brynoldss quarry Deas shepbefdsiovn con-
taIns
The inference b. plain thai quarries might
te opened IN other parts 81 Jefferson county
y'eiding ihe iiydfauiic lime equally wiih lbose
near Shephefdstown
That from tie sEpericncc and observation
81 Prof RnGrfs. the application Of line iu SOL
lrafs 70 he most bsnchciai results, and that the
lime, made n stone containing large amount
q nagoes,a 10 is composiiien (whioh is he
oharaciefofa great deal q our Valley ltmes,one, }
READ TIE REPORT,