PHSIP
V PAGE TWO V
I
' THINGS BEGINNERS ~ t
, x MUST LEARN RRST
" Explanation of Terms Used ini
feacio ar.d of Its Basic
Principles.
A - Duo to the givat Intcivst taken In r?i.
dlo since broadcasting stations have
been ; started, many radio terms ate
Keen and hen id that winy be- tmfriftiU^tr
to the novice. Some of the mostv commonly
used terms, are explained
defined beio\v. y . v ' / .
Like light, heat and sound, x&dlo
energy is propagated in the form of a
-wave motion. Every one Is familiar
with the wnvt?tmiribn net up on. the
* surfacepf a still body of water by the
dropping of a atone into It. :
Every time u point on the surface'
' of the waves goes through a complete"
set of motions and starts to . repeat,
those motions the"wave Is said to have"
gone through a cycle;
Tbe_ number of complete cycles gone
through per sec-ohd is the frequency**
? The human' e?T is responsive to
sound frequencies up to a few thousand
.cycles per second.hut Is not capable of
rieSpbndifig to the higher frequencies
encouiit(^d_ in radio. Arbitrarily -a
frequen?'Aof less than 10.000 cyetes
, has been nulled an audible frequencv
?one whlrfc ??'n be".hearfl??nrt fire*'
quencies above 10,000"cy<de8, radio or
inaudible frequencies'? because they
cannot W heard by the human ear.
.. The particular type *>f wave wbjch
propagates radio energy 4e-wi wlaCOTP*"""
magnetic wn\e. All-of us have ?een
** bltrt of Irdq end gteel attracted by the
. little toy magnets made up In the form
/ : ; . of hbratflfeoaf. This attraction of themagnet
for the bits Of Iron and steel
showed the existence of a magnetic
'
< . 1 \?2S*^BEaa30E
^ ''i Airiatsur Rtsaio Operators Er
V, electrical resonance. .stations trans- *
vJ 1:;;; tnit:tlng on.nay wy^dength other. than t
> ' '/.>; SCO, tiscicrs ' v ill.--not culs^!. -t; LHlITeill'l t
. to l'?> M?t up m rho recover. ; ,
gap:* portion of a radio re< sUvef that \f
$ ctanKea thcs wav^leff^li at whlch . it '
Is' fleetrlcnll.v resonant- if? _ called a ,,
- . funcr. Mtpposc-vinu, ".\ station'trans- 7
iults <:n a wavedengt.h of 200 meters t
unci "P.1' on a wave-length-of 3G0 ihe- <
ters. i fly .adjusting the toner until thtf" -j
constants:of flic receiver make it elec* s
T ^ ' trtcnljy resonant to a 200 mete? wave g
'' ? or a SCO-nieter,wa ve. either of the two ^
stations,ran bo picked* up;. iKit both
stations ennnpt ho picked up sltnn'lta- '"c
neoutlv. Tills Is the. reason that more v
thnn one transmitter can.be operating ^
\---_ at one time and yet only one can be c
hiurrrl on a receiver witlinnt Interfer*
part of a radio *3
^ receTvffT^iuMT^gco^.' The function. }
. of fhTa portion of th5" receiver Is to j
utilize the small currents in -th$ ^u'uerJ \
that are set up bv ft transmitting sta-" ?
tlop nSil make thgui audible^ through ^
' t^Lb nic<hurn of a telephone receiver, \t ^
~~J ' teiepTume receiver were connected . t
flrectlv <ot)lie tuuer thiarlfrgh-frequency t
current ^oafd hoi Ipej-nte ihp-^dia- ; .c
phragm of the receiver and even if the f
#U?r>hri?i'ln worn tot Irt nwiOnh If
too fast a motion !q be picked op x
Sy^fitrlraTrrnn inr. .- n i i"T*"i 1 ' |
- ., ' W! fc-Vlver thru detector Us- j
unity eoJsST?nf "two plcer of mineral'! ,
* In contact "or a piece or mineral in con* j j
tact wlfh u metnUM spfiuc?Either' ,
combination la known ea n crystal de- \ \
Utlar. 4<ipti??<V<>r~Bfl? sjjiw-U ?n?ll?- I ,
lag more thpn rt rectifier; that Is. wheoM ,
? So alitnintiiut cUrtaTtt IB tipplled ntthrrr
flow only 'In. one direction. , X.^
'?*?, H6W onn^fctfiuit Uana ft**1*
""" , The eilltdr of fi?inkper In an !*> '
. luted tnwn-tfi-thw o.namvcC-.U vpaltUE-t '<
the'radio In a most TItBetileus on<\ef- !
feetlve way. An.aaniateur radio, friend I
inirftllfr*1"'"" ..ewy hnya the
* latest. editions of thj city papers as
-. / soon as they are nJTtpe press, reads
ti*e-< mto-his trnnsiPl'w r, and
a typist I|I the, country office copies the
news as It comes In over the office werrsr
criver. ThetUlllor. tBMHgll ll Is m
(tentons plan. Is' always 'First With i
: " * tM U'l-tW" It his 1'"'". k
i - - .
^or further
-V ? A- ??' T
TFeHch-7reqiieecj out rant Is krowr.
as the currier-wove and its function
is tb radiate into space in the forfta of
vdeetrd-m agnatic waves and- \?5* Its vocia'tien
in amplitude garry with it the
variation in the, tone at the -transmitting
.
TT Is the %T<]qency -erf the carrter-r
wave that determines *he wave-lejigtb
on whteh ^radiophone station is transmitted.
lly * experiment It has .been
found that electro-magnetic ?vav^s -j
travel at'the same velocity that-light!
WHys travel, tlia?ls. lfiC,QpQ miles per |
second." \Vav?-length is the distance"!
between any two similar poifces-oh two j
successive waves; for example, the distance,
from crest to crest of-any . two
successive waves In the sarnie direction,
measured in meters, ft- udlt of -length
equal"npproitaately to . ne aml^neten.th
yards. Converting 1?6,000?miles
to meters; the equivalent is 300,000.600
meters:?Thfe ientrt^of .an electro-masnetlirwftve
Is eq ha It hen to 300.000,000
divided by the frequency. Suppose a
station was transmitting on a wavelength
of 360 meters. The frequency
of the carrier-wave would be" approximately
835,000 cycles.
Just as a violinist tunes his Instrument,
that da, makes a certain string
emit n note of higher, or lower pitch,
or, technically speaking, a sound wave
of higher- of lower frequency^by adjusting
the. tension on the string, so
may. the electrical constants of the
antenna, circuit of a radiophone transmitter
be changed in order to have
tho .station emit a carrier-wave of a
different- frequency. '
If; a tuning fork having a naturalperiod
corresponding to middle C be
placed near a violinist who la playing,
the fork will vibrate when the musician
plays mfddle C, butmll other times
It will remain quiescent- This phenomenon
of the tuning fork vlbmtingwhenever
the musician p.luys the corresponding
note on the violin is bnown
ak mechanical resonance. - If a radio |
receiver be adjusted so that electrically
Its natural period of vibration will be
835,000 cycles (300 meters' " Wavelentrjh)
every time a stntlon transmits
on a wave-lenstb of 380' meters, current
will be"set up In the receiver by
:0 j
rtin/s iJetal aw 1 '
? y" ??? aw.. i
ieM ubout the tips of rlit? ma met and j
hla-'tamfe kind'of *h ';ohl utop&eaCe.i !
b^Jelec tro-1 na<jme tl <* force, ejcd&pt that j
irilike the "toy..tanghet^.its poiwer. come* i
>0* in the form of wayy ^notions. This 1U'C*tro-ihni;nrric
rW propnsates ra- L
tlo energy-in-all directions J"
"^The.iiifidluni that transmits the elecro-nifianettc
waves is the same mtr
Hum thai transmits iteht?tlie# ether,
'his medium is supposed to fill all
pace, even that occupied by- IXuJda and
olicis. Little'is known*about its propirties.
In radio it is more common to speak
t. wave lenpth rhnn frequency. "The
rave length of any wave motion is the
llstanre between any*two successive,
rests tai tpe 'same direction. The
iini 1'neth .(Upends?upon?tho trfl. _
qency. If .the frequency'is hl^h the '
rave iength. {a short.7 Oh the Wior
land if the fiH&Ju^ncy Is low ^the wave
pngth I* long.. Numerically t}iewave '
?nctji Is enunl to the distance travTeu
by tlie wave in one second dLrided
y the fr^iyeney. Suppose, for exuhplfc.
thar It were deal fed[to kfinw 1
he* wave length of an electro-majint^tlc
vave ha,Vlrt# a frequency of 833.000
ycles. . Ktect^cvmii' gn eUc waves-travel
it'the Same speed as do ltffht waxes,.
l:at is. 186 000 miles per Second, Dividing
the 'iftfifon bv 3K.OOP the wave
would U?-\?3 miles or p06
rarcTa. In radio work Jt; Is measured
n-meters. A merer I* equn! to 0!>jrn*li?sleiv
I.V yards. Converting 8SK1
I'arrtk into meters the wave length
would iie'SP? divided by . 1.1 or :?*>
liefeni. TMH In the1 era ? -teeethwhich
KDKA ctpcrateir It alsoro*B? j
[fiat tKA-hlminMiiJigncUr wnvn? gofit I
>nr finili iH.? amthin'tHtv n fr^incnry :
nf .831.000 cycled. j
PON BAM BUT* I PRlMgiPLbB .T
?IB fl?rmll'ii'liimf?iritn'juiHI>'i1 thaw I
lire l?rii requirements Mult must be [
fulfilled. -fr'trety there miiat lii'iimMc' i
of tileh-freqaency current. guy, between i
I.I.OOrt 'linil IJWtXUOO cycles so cgn-j
TTCTtcrt in im.mitormi nnil itruuml <vHtj
ivm that winery In the form of electro- ,
iniimetK' waves will l>o radiated. Sec- i
ond.- there Ahnat lie mum method nf |
controBIni; this l.luh-tc?t|ucpcy enrrem j
or imulu'-uir.ij It x> that the variations |
in the ;i-niilttO'Jo or ln? hMSl-freiiuetli
current?wUl lc 'inertly proportional
' '"? "C t" hfl transmitted
qriU Fred-LUMlg, ifa)? lwr*K
* ' >
' . - ' . ' : *,
' .THE OOXS&St) COUK IT* :.
-
JEWEL E-OX BUflSLAfi PROOh I
Valuable* May P-e Accounted Sal*
i ' When Placed Within Tijis Up- J
to-Date Receptacle/
Among the newest tiling* that In.
r~?WH>rs hnvn stroii n? in the tn*t -few
I month* Is u box that comes us near to
i being burglar pi ort a* It fco possible
to imagine. It .looks Ilka an ordinary
i stt^l bus wl?h a .keybolo in leg side.
Unrjust lift .It or move It und u loud
(alarm bell . begins to ring Inside It.
'Hits bell keeps on' ringing for flee
hours and it cianuot be stopped- without
unlocking the box. A
bnrglnr might carry off the box.
but its nlf rm- would keep on ringing
aiiiT- would give hint uivay before he.
eonld get It to si place of safety. If
he touches It, even stumbles against
It: the alarm will arouse the house- I
hold, for . Lite slightest movement but- |
toys i? rec it ringing. This Is also
true of the dishonest .servant.
The owner can, however, open and
close the.box at will, as he lias the
key. And the only way In which he ,
van be robbed is by some thief stealing
the Key before tampering with the
box. .."_i- ' -r?7*,' ~
This safe is arranged inside with
trays for small articles, money and
jewelry ajnd with space unifer them
for securities, stfth us bonds and
mortgages. The whole is 'made of
seamless _stee"l* nickel-plated, with a
piano hinge and "strong double-lock.
There are no duplicate keys, nor Is
there-* master key That wHl open it.
IMPORTING HOUSES NEW FAD
English Residences Cerilpries Old Are
Actually Lived In. by Wealthy.
New York Residents.
Several .houses complete in every ,
.detail, dating from the Sixteenth century.
have recently been imported from
England. -Lovers of the antique
rmiy enjoy the* unique experience of
living In the actual yooms which were
built and decorated three centtliiea or.
more ago, and be within convenient
commuting distance of- N.ew Y^rk.
_Sftch huraes are nuthrhlly expensive, 0
,??5r-the original cost la. not only considerable,
but the coet of. transportation,
the tariff and the. expense of rebuilding'are
naturally great.
An English firm winces a specialty
of selling these houses and' keeps a
aumber of them on hand" in th*lr
show place" near London for inspection.
WKen an'old hoqse is to be .
porn down to make room for some Ira- _
-provgment. -the building l? bought In, 1
fckually for a nominal sum. After be- 1
ing. carefully tafc^n apart U is^t-ybnllt d
in the show place near f.ofidcffiTj^aUy
for the . inspection of purchasers. If m
it-is bought by an American, for toistanee.
thy "'"f A** * ?
down and packed with Care for shlpi
ment. This work to by experts*
So that the parts, especially the wbbd
work, will not be jn^ijred. The Eng- ?
lish builders usually come-' to Amerlcp
"Q setnn> the house exactly aa.it drljp **
VnQlly . stood , 1% England. , In some iriMtittieea
these ^>ld houses- have, been
vi-ith .English -gnrden?. re* <
"produJiiigthe -original settikg in Eug'uHUi'f
ten furies pnsi."
Ccn-.ps f04^ Motorists.. C
FJ^re'U the latest i-ui^a. iu camps for
n r s?n. flic. I'onuiar Mechanics
M.i? r. !iip : ' ,\n < >/j|iran<r(t.'at.) concern ,j
:s i;nii 1,0 'less* than -?80,000 .in
' *t)jiiY!ra!fettCf|?*vik an eight-acre ?
:<r "be lot .to motoring tourists' by j
;.:c ji.ii-t.t r .far any longer period.]
yf[. : ''(;w> -the manage- }?
K;:t- jokjngly autvbuncvs.h which.- is
leng;of the- ii: the-laitil. c
siib.pTV/ residences r>re designed
rd.ntke the place of tents, and while .4
fai-'.i". l'uiTCJsIikig'si v. re .meager compared
wgtii regular houses, they offer ecfcv*
\ ; t..f,ra in ( Ihf. v.mf ,.f .--mii*. _
oSfciicea that is commonly otfe'red. by Jtn
.rd.uary rent. These- bujugaletttis-are -
at' two some with one room "anil- .
some with two rooms. They are hullt ^
gj?rt%ely. of wood. and. are -etf'dppod?
wifh sink?, running water, i ^ortric
lights, two-burner cits plates., etc.
Spring Beauties. 1
One of the- commonest varieties of
ffew.vs faimrt after . the scunu . has
,?1'?>.1 awav is the Spring rVtnnyJ f
The little blossoms are a very (tehcaiUpint;.
Each pet'nl is lined wtrfi hair
lines of deep-plnkr Seine natrirhlhgta ?claim
that these hair lines j^f deep
pink .are honey guttles for insects, . _.4
hltiuc thnf *?AIH* *K? *? '
.. ? ? ...lit, |<vuiv inr naj (.?? Illf1 TlJ.y
snc of honey to he found In the renter 5
of the flower.
Although the strrlk of tbe S;>rlnz Bfftuty"
l? very slender, 'f is quitesturdy
enough to soppo^t. the twtg
Bliixt greon leaves. In the luise of \vhi?'h .
Is he^d the "flower, unrt ft Cluster of.
l11ttllT^iv" hrftl* "Mfth rn
larger than m jUte* tlrpeatt - ' - '
An l/nwolcoma Dancfc.
Lady Constance 'Stewart Ittrfca'nt-son,
whose bfaarnsi th/oclng made her ;
known In* America^ wijs married re- J
story nbont h*r/khTr~"t1ie- Jhichesa of
?fttu'fl, yt a /charityconcert .at ana
of the creut houses of London-' her J
husl \xfd-ffa* rturWss:
"W'fe to. have ah eatre number. _
!' ir Lady Conatanee bna consented
i . do lay lairef.** l'erstnn dance."
"Ob. 'dear," the rinchefs cried. -?f
Vnew^'when t spilled the salt' at dinner
that something dreadful tVould
happen before tn? ntgni was orer.?"""
T"
Jud Tonkins. i
. JUd runklM says there Is always a
Tittle soon thing. to be Ihuniful" f5r.
Miico I r ji? link aid T-su lu lis >tn ftpensive,
there aren't nearly an many
untwrc.Pfi'ft thw'T OP
?:..'.~ ' ^ ~T
_
_ - ?y
Vf'.SVjg!68 ' '
I ' *. ?' * ~-V% I
5**.i' * '< " t ;
Ifj fc V . I
. PEGGY- LET THOSEIT
COMES SLOWLY BUT U
Y ' ^? ,
B1
THH VVbmAKr: UF I'HL'St
because
BANK OF ROXBORO.
safety deposit hoses for rent.. ..
Your Account SoRcied- .
OMMF.RCIAL PRINTING CO, "
Put H. Clay, UTanager .
The Shop That Serri?e
? . -n I *
FIRST NATIONAL RANK, 'j
- . Capita) v>7fr,00t).0f? j?
lurpius. and Profits. SSOvQQiXOO j4
? ? i >-i t
ROXBORQ GROCERY CO. I
Roxboto. "N. C. ' p
Wholesale (Trocei us
your order' _
ROWELL AUTO COMPANY j 1
Roxbom, N-. C.
Home of the Ford
I ' ' ' ..." . ~
SHRGEANt A CT.AYTON
The'Sanitary Greeery Store
'hone ua Tour xcanK prompt
delivery.
DAVIS . DRUG COMPANY
I {ox bore, N. C.
Jake our store your headquarters
"
; T ? ~ ; I
BRADSHER-& GATES
* r> ~ ? M r
> , - IWJ.WV1 Uy A"*. V'.
king your automobile troubles
to us ?
MOE GOODMAN )
White Front, Court'Street jj
Our prices kin?try .us jTHE
PEOPLES BANK, |3
Oldest and Struiiaeat ~f?
Vssets over One MllUoh Dollars
THE
Better a
r<
drabser i be tocb
r... % ' - * *
. v. '-v-;- "
. *" ': '
_ .1. " ',
. ?... .
WHO DESEFMI PUNISHMENT
J VERV EFFECTIVE.
. . . . . - * :'
" * /? . ^
v* * " J . . ..j
' " '
ETTE!
I 1
ur eve n
: MERCHANTS SHUlLlJ OH
YOU RISE AND PALLJWITJ
Fy i '
. W. L- .MOORE
Fresh Meats and Groceries ..
'our trade is sSiiaiUd?satisJ
, faction euarahteed
R. A. SPENCER & SON".
Undertakers ,
t
Service?Ijjpt?prices'
S. P. SATTERF1ELD
Insuranie
"Old & Tried." You know.
HARRIS & BURNS
lioxboro's "Best Store
verything for the comfort of
the ,f Unity
*-^== i-i-?
o. hoy. rights bay at the right
place
VHLBURN & SATTERFIELD
Roxboro. N. CGARRETT
& WILKEttSDN
??Rocrboro, N. C. General
Store?anything and
afwy thing.
ROXBORO COTTON MILLS
Roxboro, N. C.
Fine Yarns . ?,
THE PRINCESS THEATRE,
Roxboro, N. Ct
Amusemeift for '.lie entire .
f. 51? '
laamr . .?- HAM
BRICK & AUSTIN^
Druggest
(lock's Candies. Finn stationery
, and -Toilet Roods
ACKSON MOTOR COMPANY
lludetmkers, Iteos. Maimer's
Overland Oaqaad Oils.
COUP
nd bettereac
iyH5t^feai
. ; . 7'". - '' ;
'
- . . tv . jS/v. / ^ ^
v . '
'* '/ . v ' ~ v - 1
" i" *
v -k'*f'
BEAR *t patiently.
??: ' v .'- t ' ,*.f\ '.1
R
n reggy
Y01H FIRST THOLGHT
I THEM. '
j ROXBORO LUMBER COw
Roxboro. X. CEliy
fcum us and bank the dif?
deference*
tvATKINS & BULLOCK,
< \ lioxboro, ~N. C.
Everything to build wrtfc.
| T~ - ' .
.. A. IJPSHITZ
- Roxboro. N. C- V.\
The Stcfte of jQua&ty
SPOON i 4EWIS
. Consulting Engineers
\ Koxfcoro & Greensboro. N. G.
. NELLO L*, TBER *
Road Contractor,
Royboro, N. C.- -
JOHN F. REAMS,
GeneraFCortractor,
Roxboro. N. C. * .
Flgord with me beforo xoo build
ft)fE COURIER
Year :
AH kinds of Printing '
ROXBORO LIGHT 8- POWER
- co.
Roxboro, N. O.
? "Do it the electrical way."
BLANKS & MORRIS. ' x
Roxboro. N. C.
For best Groceries. Phone 25.
G. W. KANE, .
Roxboro, N. C
Contractor
To Purchase The Ri*ht Goods at
the RIGHT PRICE. (Vint to *
1 HARRY TTAIFrS m ~
OPPOSITE COURT HOUSE.
HER,
h week"
f and worthiti.
- ^ _
? ? * J , V.- .
?: ? ? ? ^1