New-York tribune. [volume] (New York [N.Y.]) 1866-1924, 1892-12-12
Ing but more particularly to the effect OF The Harvey


The new trial took place at Indian Head on October Der
highest degree satisfactory. six plates were .rea'
THEE having been furnished by each c0nractor rep r
ceSses Each Of these six plates of domestic mann
actue proved superior to the English con PE rhcn
while the Harveycd nickel plate, anu the hsn ca o"n
nickel plate we're superior to all the foreign pIals
Of the Annapolis trials Any doubt ihat may ,t E ~
The nickel Steel and the alseel plates were finally
set at rest Of the three plates made by be Warvy
FUN were OF nickel steel one treated oy INC mar va
process and the other not, and the third was oi dh
Steel liarveyed. - e., sunoror 70 the
oll etcel plate which was the poorest of the lot NOT
whsandng the advantages which II may nave e a
r yfS l re The e French steel plate tried Annapolis
third nickel plate, manufactured by Crnegs, Gtge
ever the All steel plate OF this year. AMI 6otn !. ana
The corresponding Bethlehem plate showed csPloy
s n nse.y p Ia per The
bon nickel Harvey plate was not only the pest OF Ian an
fhe plates tested but the best dmor plate ever SUI
'etye a. result Of this trial improved methods were
in 81 he c 2TySy The ar Of these
took place July 90, ls92 at indian Heyi a, si tn
made made by the bethlehem Iron company the plate
having first been forged 10 II IL Inches ana theh
sGyd and hr Two e pPcOus trials the
Shots had, been fired from the Ginch gun, and the
Slne. In this trial the snch was used for oil Of
The shots The result that three Of the pro
plae' while the two rIghihand shells penetrated
10 a depth OF thirteen incl es. IL was eVloeht UNI
there was want OF uniformity IN TIC hardness oi
thc surface and that some special cause must have
softcncd the righthand side Of the plate Pon
Investigation it became apparent that TINS was due
10 the process OF reforHng resulting IN loWcr
temperature and consequently reduced Conformation
upon this side Of the plate Notvltns 'ahuis ,i'
penetration Of the rlghthand shots, the result
by which the plate had remained free from cracks
was an cxtIa6rdinary confirmation OF the exPeeta
tons that had been formed rs 10 the possibilities OF
| ,.icis.I 81
II remained for final trial TO demonstrate the wis
dom Of the steps which had been taken. and TO crown
the efforts nearly fnr years with the highest degree
Of success. This trial took place at the proving
ground OF the Bethlehem Iron Company July 20, lo!'-
thickness tcn and half inches that Of the prevlou,
trial but unlike It's predecessor II Lad been forged 10
Us final thickness before the Harvey process was APP
nliod. As I'm the previous trial. the oilch gun was
alone used. Five Hotter fOrgodstccl Shells weigh
ing $50 pounds each with striking velocity Of ZOO
feet per second. and each with an energy of 5000
tons 10 the square foot, were fired at the plate nj
distance Of thirty yards.
Never before ihcsc trials had any armorplate In the
world been subjected to such "A test represented
By these five blows of total energy Of $1,000 foot
The prOrcics were smashed upon the surface Of the
plate. The plate showed signs II injury further
than the opening Of slight temper crack four inches
in length. from ono edge. and n vale less than one
inch in thickness the lack Of the plate opp1slt"
each point OF impact The striking end, Of the pro
icctilcs appear have been spashcd on the face Of
blow with material. which became welded 81 The
substance OF the plate Itself and left II as before
flush surface. The remainder ~ The rrolectiles could
ont be found in the shape Of innumcrable scattered
fragments.
The manufacture Of modern high p>wer guns has
been distributed between the lat three Administrations
follows