The commonwealth. (Greenwood, Miss.) 1896-1923, 1898-05-05
SHOOTERS

Utilities thransb .sr.a efr.s, ,ril.s ,F
spsrs saws .orr,.nor5snt r,ts a.
much further tbap tbe nnoi5al ey, ..a,,
saa clearly o,. aim a gnn Min, ,rv,nt,r
like effective ,rrn,a.,. f,r Il is ,,f.r.,
/ that mpsf sppplnn.r, rba .y, sn3
IbrIng 10 IFS ail eartq,p 1,If,sforv IN.
! juytpd instruments b.f,r. IA. l,.l. ar
| fhpse gre,t Gums cam ,o mad, f,,,itr,I
nh Ionv rapgn Assisted l,p tbsg, a,
sfrnmepfs h Is NOT onIy r,s-ftl, Init
prnb,ll, that n s1.ipo5 .nn,.r ,r.,,l7
bo allie In lii nm rran,y,s ratrnsnia .t
A distance Of siz miles or even r,riber
from the u,Hgzle Of bisr rnp
In tbc FIRST pIoce Il must be ppapr.
atoo5 that fine proiarliles erp5 f,or
these grast gnns An not troyel IN
strsi,,bt linss hpf il, cn,ros. ,ra tlot
their ronea or n,ipt of contact
with tbe earth IL determined Inv ba
angle of tbs elevation Of tba grn harrel
The reopire5 oprle oP elevation of
zach ann IN orlor r, throv .bot ,
carfejn di-tspco IA known =, ,ts gpr
rer Hence a. An, distance NJ , s,t,
or other o,,ieot fy,p tbs gpp "a l,rao,n
tbp Gunner hos oply 10 eisvsfe ris gpr
10 fine nroner opeIe aim n ., That q
win ba IN line yilb tbo torgst and gro
with fine rartgiptv a,1f his ybot will,
strike fb,, mani, IN. no,rt,f,
Tins "a win aq4ep t,nt tbaiu,prrf
opf tbipy IA IA dofs,s,ins aai.l.lv a,3
ocs,r,ta,v tbo 5isfg,cc of IA. a,,io.t
To be bit from fbp gnn tbof Il todo tIe
HITTING, and rigbt barp n is tbat science
stans in with tba range gndor ne.
sta5imetar tbo ranpp indicator tbe'
ronge tpIegrapb and other si,e3ti,,.
jnstrnmapfs These ipstwrnepls have
been perfecfad untiI TODAY t5e distance
or an object from given mint cap
be a,to,,pined From tbem with porve,
ops apicIpess and accuracy
The hasic nrincipla of fba mo5erp
rapga finder ia gound in lrlgono,ostry
There ore two methods eu,ployad
The SIMMER method reouire. bnt ono
oparator and ia ussd where the distance
from an object to the instrument has
been preyfopsly aaeertaiped The nd
insfinv telegronb ID Rrgt directed af the
object whose distance is ..nowp and
then turned until polpted at the object
iba range Of which Il "A desired TO deter.
mine The angle made between tbs
two points ia recorded and Thus the
finding b tbe distance to tbe aecopd ob.
ieet becomes an easily solved problem
in trgonometry II win bs seen chat
this method would not bg available on
board a constantly moving baltle.ship.
or vbers Il Il impossibIe TO first meas.
pa tbe distance between given object
and the poipt Of observation IDi Disused
in harbors to find the range Of approach
ipg vessels: and the operator Il usually
stationed on an elevation near tho bat.
teries with which hs IA in close commu.
picsBop Tho instant the range Of a
hostile vessel IL found Il can be signal.
al 10 the battery and tho guns aimed
and fred At once
Tho second method Ia based on the
same pripcinle bpt reouires two opera.
tors and corataut +eIegrapbic commun-
jcation bstweep them ana Che batteries
Two men with their instrunents and
adipstipg teleseopes nre stationed AZ 4
known distance from each other Each
poipts his telescope al thg object whose
range It is desired 10 Gnd and the
angles made between the known base
lime and no two imaginary lines drawn
from the oysrsoers to the object. are
measured. Thus one side ard TWO ad.
! iacent angles Of triangle whose YER
tex is tho object are known and
simple mathematical calculation gives
the Feauired distance
This is the method employed on board
battleships where the arget as well
ag the point Of observation. may be In
constant motion and the range ig con.
tinuAlly changing. To make the range.
Gsaer effective under such conditions,
| The different distances indicated BY the
range. finder must be instantly and con.
taufly transmitted to the Qunners This
work is done by the range telegraph, by
means Of which the aseertained range.
At apv uvep moment. Is indicated siIs
sntlv and accurately 10 each gunner In
M y,oy M INNS of n sb,n ssn " kent
constantly trained on Al approacbing
or retreatip,, ,s-.l and their fire very