The new South. [volume] (Port Royal, S.C.) 1862-1867, 1863-10-17
GEsERA1 G111MoRE ON LnrEs, CEMENrs, st..

GENERAL GILMORE ON LINES, CEMENTs, &c.-
The publication, at this moment, of stout octave
ON q. Lines Cements and Mortars, " by one who
has made his name illustrious by setting at naught
the binding powers of these substances on the
walls and foundations of forts, has almost the air
of a practical joke but General GnLsoRE in
forms us in an Introductory note that the expert
ments and researches embodied in the work were
conducted under the authority of the Engineer
Bureau of the War Department, and were COM
pleted in the summer of 1861. 1t will prove a
valuable contribution to the engineer and archi-
tect into whose arts the elements under discussion
in this work enter for so much. General GILL
MORE, unlike the majority of the graduates OF our
military school, who rest quite content with
what they have learned in the text books, is foId
of original investigation, and he has talent for
recording the results of his Investigations. His
report of the reduction of Fort Pulaski, overleap
inc the narrow limits of a mere official paper,
assumed the form of comprehensive and instruc-
tive memoire ON the preaching power Of riied
ordnance, and takes its place as valuable piece
of military history. The present monograph,
though on more specialized subject is an i'm
portant contribution to the branch of practical
engineering which it covers Such work, en-
bracing all the results of the latest expeEiments,
both in this country and in Europe, vas very
much needed and General G1ILMoREs detailed
and exhaustive treatment completd fills the
desideratum.
"It is needless in work of so purely technical
a nature as the present to do more than briefly
indicate the scope of It's contents, as professional
men, who alone VIII be interested in it, will
doubtless procure the book itsef General GILL
MORE begins with a survey Of the geographical
and geological distribution of lmestones, and
stone suitable for hydraulic lime or cement
throughout the United States. 1t need only be
remarked that nature has supplied US with these
elements in great profusion and endless variety ;
but the most extensive beds have thus far been
discovered in the valleys of the great Appalachian
chain of mountains, as they traverse the States OF
New York, New Jersey, Pennsylvania, Virginia,
Tennessee, and the northern portions of Georgia
and Alabama Hethen gives the method pursued
in testing the mortars which furnish the basis of
all tables introduced into the report These tests
are with a view to determine (l) their capacity to
resist transverse strain C2) their relative hard
ness (3) their adhesive properties Chapter l,
is devoted to the celebrated Rosendale cements,
so named from the fact that the stone was first
discovered in the township of Rosendale, Ulster
County, in this State the different kinds and
qualities of this cement described and analyzed
and the various manufactures OF the cement are
given in full Chapter ", goes into the subject
of lime. its characteristics, tests theory of its
induration in the air., classes of hydraulic lines,
intermediate lines, natural "pozzuolanas,
s.trass," "arenes," hydraulic activity and hy-
draulic energy, artificial Portland cement,
strength of certain mortars, &c Chapter V, treats
of limestones, hins, mode of treatment, dc.
Chapter VI, of calcareous mortars and "aggre-
gates, the process Of making them, by mill and
hand, and the mode of application to plastering.
stuceo. % &c. Chapter VII, of "conAste" and
tsbeton." their uses, mode of manufacture in
Europe and the United States Chapter VIII, of
the devices of laying stone under water &c
Chapter X, of mural efiorescences their causes
and remedies and the general methods of artifi-
cial induration The volume is issued in Nh.
VAN NosrRAND's accustomed excellent manner, in
an elegant octave of 333 pages, copiously illus
trated-Army and Nary Journal.