The sun. [volume] (New York [N.Y.]) 1833-1916, 1892-06-21
'tAN FIRE DYNAMITE SAFELY.
oH. JUSTIN SEEMS TO HAVE SIC
ChLDED WITH mrs PROJECTILE


- Fired u 'pratediy rrom Regulation Cn.pon
o. and Exploding or Not Upon Impact Ae-
cording ms the PrcJectiIc'- Magazine Had
I'N't Been Arrangod-The Tests Yesterday.
rI', Urea. June 2O.--Furthcr experiments we're
made to-day in Pcrryyille Gorge before tho
United States Board OF Ordnance and Fortif-
cation by Dr. joel G. Justin OF Syracuse. test-
1ng lis invention OF s shell for carrying high
Explosives.
~ Although Dr. Justin had endeavored 10 keep
The date Of tho test secret. there we're about
two hundred persons present including
several photographers. Tho ordnance had
SA'bcen placed in tho bottom OF tho ravine. and
Tho target was about 500 feet away. 1t was
l'it The rocky wall Of tho gorge where tho trees
' bud been cut away.
. In addition to this target. butt had been
Reconstructed about $50 feet from the cannon.
Il was made OF huge timbers. with heavy
1armOr plate. and backed up with tons OF clay.
Nv The cannon. one twelve-ton gun with q
Ainct bore. and tho other Parrot gun OF
6a-iheh bore. were covered by walls and roofs
sof timber. The earth butt was in two parts.
Tho partNscd in testing tho 5-inch shell had
f11 feet Of clay bank and h-inch plate Of steel
IN front. Tho part for testing the 9inch shell
WINS faced with three inches OF steel backed by
as feet Of clay.
- The first thing done was the inspection by
" Me I,onrd Of tho ordnance. projectiles powder
aud explosives. Ats o'clock nine-nch shell
was loaded with Gelatne in tho presence Of
the Board At 10 o'clock the national colors
Wore run IN from the staff at the rear Of the
cannon That was the signal that all was ready
Nor tho FIRST shot. DIR. Justin walked to the
,bomb-proof building in which the members OF
Tho Board wore sheltered. and touched an
plcctric button, and tho first she'll was dis
(: enlarged from tho Parrot rife. II struck the
rocky wall. and tons Of stone ratified down the
bslopc. DIR. Justin had demonstrated the suo-
!. pess Of his invention.
~" His plan has been tho DISCHARGE by means OF
SIowder OF u cartridge filled with high explo-
sives and have it strike q target with all its
NORGE md yet not explode the gelatine. This
Us precisely what was done The propelltng
Achargc was pounds OF prismatic powder.
Tho empty shell weighed 5eS pounds and |
Che amount Of Gelntine was 6E pounds. There |
was no explosion when the shot struck the |
Jorks. although the force was sufficient to dis
srongratatod him. but 10 .ssid he would do
Greater things Six moro shells were thrown
quit. ii was lifted with g delayed: action fuse.
Eand penetrated ilye;eighths Of on inch Of steel.
SIN sa%s tssinx ths 5 - to ay rasnsnts O
VI h5s, san s eSn fnSs Sh paun sR
rocks was enormous. 225-p0und shell. with
Snsssd 80 pasanst the
Aut with the 3-nch steel armor. It went into
si did not enf er tho clay. After short delay
TIM tor. and steel new into o small Bits 0 "'
Tho Board announced that enough had been
either for or against the Invention; DR.. Justin
felt highly IlSased; and although tho members
+soemod satisfied. Since his previous tests the
% M has h entr Ely his
tie shell before leaving the t cannon. p''''A VI
~ The shells used to-day have an inner maya
a the 81 saS has
s hnk metal fEs dS Sr the o rS sEn
q the high exp osive '4 came more n from
the friction caused by giving the rotary mo.
Filing si 'aS Snfi hnn from the sSoo
Starting start. forward or course. the outer shell
s tho old ts Sas motion tic she
was sent revolving rapidly, before the
eoq% thus " SSeane the heated %0t snd
wood Th5 is n9W rasty IN, BY
base 81 tho inner maSazinS, slightly conSexed
the tna the It ss lien e "n sangg
.sxH W5Gf hs stes 6s %StS
When tho shell arrives at its destination and
Teded In its flight causing the inner maya
Zinc to plunge forward This causes the DIS
charge Of primer which communicates with {
-detonnter which is placed in the centre Of tho {
explosive. When the detoator eNplodes it is !
like the explosion of a small secondary t
bomb inside of the magazine, causing
the immediate discharge OF the hlGh
explosive. DR.. Justin has a contri- I
vance for delaying tho communication
i5styeen the primer and detonater. so that TIE I
final explosion may occur at once when the c
shell comos in collision with the target.
fraction Of a second. or several seconds later, I
Us may be desired for piercing steel armor. I
lie now uses Gclatinc because 1t Is AZ per cent. {
N ore powerful! than any other explosive.