New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1891-11-15

16's inches and rebounded breaking into three large
pieces and many ANAL fragments, the latter scattering in
oil directions Over the second point OF impact was
semcrcuar scar left by the rotating band Of the SHE'LL
which had struck that part Of the plate. The
first cracks to dishsure the surface were
here developed three fsyed but probably not
to se FIRST. second and third points respectively and
deeper assures from the first and second points trans
'eTsey to the top and bottom edges respectively. The
apcrturcs showed the wooden backing OF the plato
Round No 15.-Fffth shot against the Bethlehem high
carbon treated plate centre This shot in which
interest centred The plate well wthstod the
sau that the crucial be this final eighth shot
which, however was 70 be robbed OF It's exact and COM
paiatve value by the substitution Of the perfect
Frmny shell for It's American prototype the Carpenter
projectile. The test one, and the results
were commensurate with the severity. The penetration
was 1873 inches. The proecte entered the plate at
slight inclination, that when it picked amons
the spnters of the gun,hcd where rebounded it
found slightly buged. There fringe about the
point OF impact the edges ragged and Clipped The
plate succumbd the attack and four cracks developed
They were continuous traversed the FIRST fifth and third
points Of impact and presented fssure semicircular
in share from the top to the bottom of the plate The in
jury confined to that portion which offered least
sancc the left half the ncancity of which had already
demonstrated by the greater penetration that side
Of the plate.
This closed tie days firing and left the plates in
this relative position High carbon harveyized plate,
FIRST; high carbon untreated plate, second low car
bon harveyized plate third-a relationship that
ains the predictions of the Naval Bureau of ordnance
and justlfcs lis adoption of nickelsee Of high car
bonization and Harvey treatment. The classification
of the Carnegie highcarbon plate untreated is due
not so much to external appearance-tsrc was really
little choice IN the facial results between that and the
Carnegie low-carbon pate-as to less penetration In
the one case than In the other The Carnegie un.
treated plate showed surprising invulnerahuty az
its centre provided the Carpenter shell was up TO the
standard on which point there is some doubt The
shells uniform throughout, the single F1rmlny
used proving Of exceptional merit while NEARLY o,r
al annapolis last year and subsequently,, however,
demonstrated the unquestlonable efficiency OF poih
shells. The guns performed splendid service Us o'u
the carriages. al. o,r.uo o,d
to The Tribune correspondent after the trial. Inc
high carbon nickel plate from bethlehem Ia, SHOWN
the least penetration and the least cracking OF any
of the six and Is decidedly the most SUCCESSFUL piae
onehrd less, than any of the plates Of the last trial
In no case did the point of the projectile
get into the backing. and the platc cracked
toward the weaker SIDE The high carbon from
the Carnegie works was 40 per cent carbon, wmcl
probably crack The temperng methods used In the
low carbon nickel Harvey plate were eXceeolngy Dc
fective and we did not expect from 1t better results
than from the unharveyzed nickel plate which Carnegie
furnished before. The 1arveyiZed hgh carbon ncKel
Mate from Bethlehem has been our favoritc and Is
Internationally superior to anything ever tried in the
way of armor in this country or abroad
II will several days before the 01nccrs on uuty
at the naval ordnance proving ground have the remain
wifi be made as the plates are affixed to the
backing. These plates are from the carnegie w0rks
and comprise a 25 carbon nickel plate ana 20 CARBON
all steel plate, but Harvey treated