«me« KAY oouwty mag, ska ian pity, k. j.

^ Mardf Gras Mystery Bj. H. BEDFORD.JONES

DOOtUIUT. Art ©WMT

Die tale el a eamlval ke that led to gran nail-

C«mival. cMn Fell pushed aaMe the |

j m the wttodowe of the Cbeae Checker* dub. end gawd put upon notoui atiueta of New Orleans.

. nge room for Dr. Cyril Anai middle-aged bachelor who had tlced In Opelooaaa for twenty 1 who had come to the city the ManH Oral feeUrttloa

e wait, but Jachln Fell wae quite L d modi the elr of a dark. HI*

pale e. ilon of wondering aloofnaaa, aa iph he aaw around him much that rinly tried to ■nderutand. U hU unner waa a ah} retlceace. Ha clerk, boweverj thU waa erlfron. hi* ittlre. Ha waa garbed ad to foot In eoberty blending

maid of the odor hi* evening dothen. entered ;c room. andJTeU turned to him ■ dry. tondes* chncfcl l ou-re the UmKI Did

“Wlaard!" The doctor|Uughed in nnlenn. •'Tee, about that amount." “The Masquer te a piker," obeemd Fell, la hi* tonelen voice. “Eh? A piker—when he can make a hundred-thousand-doU*r haul?" “Don't dream that tloee figure* repeeant ralua. Doctor. They don't 1 AU he loot the Maaquer has Uken atace he hejea work la worth little to him. Of conrae, the croak baa obtained e bit of money, hot Jt enough to be worth the rlak." “Yet be haa got quite a bit" rethoughtfully. “AU the ey, naturally; we don't gay carnival moment t-*" Td warrant you're * hundred dr eo la your pocket right now!** “Not IT rejoined PaO calmly. "One »-dollar bUL Also 1 left my watch i home And Fm not drheeed; 1 don’t ire to kme my pearl atada." “Eh?" Analey trowamd. “What do on mean?" Jachln took a folded paper from hie It to the phyelctaa. Halliard at the bank this He called me Into his offlee

it? However, w* need not leave for «n mlnutm yet at leant" •ortor Ausley laid aside hi* cape.

comfortable big chairs lou intend to maak for 1st Ansley cast hi* eye over the. y busmen attire of the little I never maak." Jachln Fell abook bead. Til get a domino and go as m. Excuse me—FU wider a domlao f. Beck la a loctor Analey followed the alight e of the ether anas * eyea Well aa ha be invariably found the -oaa a re of puzzled e luring many years Jachln Fell had a member of w Orleans dabs. the inner drdea of Creole iety. which in Itaeifwa* evidence nu- ■ poeitloxL At this paralar club be was tamsd as ster of cbeae. Ha never < imament, yet he consistently defeetthe champions In private mate? ~ rated them with a bewildering shy and apologetic ease, an ease ich left I’

aghast

’1th *

( hi*

ich of a mystery.

•e*t frienda. Vary little wae known him; he waa a lawyer, and certainly Intslned office* in the Ms' inebe bunding, tut he never ired In the court* and no cane of his

■ding ansley

Ansley knew of a tew who uid boast of having bean a guest In chin Fairs home. There w an Invalid, of whom Fall »ke and to whom he appearod to dele hlmseU tbe city, mm Felt Ansley pa lered these things. Outside, be the Orleans streets, was rocketing mad mirth of carnival. The weak ecedlag Mardl Uras waa at aa ever, was Mardl Oraq aymllzed by masques. In Mew Orieans

drop the prince stuff altogether If thee* Freud, people around bwre would let A page brought the domino. FeK, discarding the mask, threw the domino about his shoulders, and the two men left the dab In company. They sought their destination afoot ’the home of the banker Joseph Malllaid.' Tbe streeta were riotous, fllled with an eddying, laughing crowd of nere and merrymakers of all ages sexes; confetti twirled through sir, horns* were deafening, and laughing volcec rose Into chary screams of unrestrained delight At last gaining St Charles avenne, with the Matllard residence a hniraaen blocks distant the two companins found themselves well away from te main carnival throngs. As they walked along they were suddenly aware of a lithe figure approachfrom the rear; with • running leap and an exclamation of delight the figure forced Itself In between them, .•lag an arm of either man. and a bantering voice broke la upon their train of talk.

are your mask*, sober gentlemen? This grave physician may be pardoned, but not a domino who refuses to mast 1 And for forfeit you shall be my escort and take me whither you are going." Laughing, tbe two fell Into step, glancing at the gay figure between A Columbine, she was bo*h cloaked and masked. Encircling her hair was a magnificent scarf fbot with metal designs of solid gold—a most ual thing. Also, from her words It waa evident that she had recognised iem"Willingly, fair Columbine," responded Fell In his dry and nnlmpassloned tone of voice. “We ahull be most happy Indeed to protect and take yon with l—" “So tar as the door, at least." Interrupted Ansley, with evident caution. But Fell drily laughed aside this wary

a Hundred Thousand Del tar Hauir as be rm' tbe note, which waa addressed to u»atr boot of ‘Joseph MalUard, President, "Exeter Kationsl Beak. City. “I thank you for the masque rou we giving tonight. I ahall be pressot. Please *ee that Mr*. M. wear* her

•THE MIDNIGHT MASQUER."

note hoax? Boms carnival JsstT "M alllard pretended to thlak eo.’

Ever since the firat ball of tea year by the Twelfth Night dob *hla Mldnirtu Masquer, a* he was teamed, had btOfl New Orissni arlpybd U fascination and vivid Intaeeet. the peat month he

ful frolic of colder dimes, t occasion le but one for display of 'el* and cost pairs, and where actual ament of Identity U a farce, re in New Orleans were Jewel* and lumee te a profusion of eple it here waa preserved the underlying ra of the maaque ttsatf—that In conolment of identity lay tbe Ufe of the ilng; " hen Jachln Fell returned and Ughtdgar be tank Into on* of the xurious caalta beside Ansley and In- • ted a newspaper lying acme* the 'ITS knee. Its flaring headline* i ng out buddy. “'Vliafa that about the Midnight nviuer? He's not appeared agnin?" ' " hat?" Analey glanced at him In nrise. “You've not heard? Good •i.vena, man! Be showed op U* f t at the Lapeymwae dance, two ■nutea before mldnlgnt. at usual! A " "dire had been engaged, but wua rward found locked In a closet, •und with hla own handcuffs. The ' »quer wore hi* amai costume—nnd mt through tbe party famouely, rg every oaa la eight. Then he ‘'ked through ib* doors aad vani ‘ li pointed hi* cigar at the ceiling. 5,1 “Ah. moat interesting: 1 " I "*! w** vlined at about a bua•l Miofisaad?" 7 * bought you arid you’d net heard

£M>U)

POSITION AND SIZE OF GRID IMPORTANT Determine Value of Negative Potential Necessary to Reduce the Plate Current to Zero. In using a three-electrode vacuum tube in a radio set it la preferable to maintain the grid negative with reaped to the filament In order to require the minimum amount of energy In the control of the plate circuit. The relative position of the grid with respect to the filament nnd the plate and the slse of the mesh of the

If the 40 volts la maintained on tht plate and a nagatlv* potential of R-O la applied to the grid, It will reduce the current to aero. Suppose O-E represent* five volts. It can be seen then that a change of five volts In grid potential will accomplish the same result that 40 volts will In the plate circuit The ratio of the voltage change In the plate current Is called '.he factor of the tube and Is denoted by the letter “K." In the tub* Juet discussed the atapllflcatlon factor would be 40 divided by five or eight. The amplification factor of the tubes available for amateur use at present Is usually between '4 and 10. The amplification factor la a function of the dimensions and reletive positions of the element* In the tube. An Incoming radio frequency alternating current applied to the grid of a three-electrode vacuum tube la not only rectified but the variation In the plate la multiplied by “K.” the amplification factor of the tube. ThU

“Nay. good physldun. farther !" on Frit "Our Columbine has an excellent paaepert, I assure you. ThU gauzy scarf about her raven woven for the goc* Queen Hortens*, and I would venture a random gueea that clasped about b«- slender throat the queen's collqr of star sapphires—" “Oh P From the Columbine broke a 7 of warning and swift dismay. “Don’t you dare speak my name, air— don't you dare!" FeH aseented with a chuckle, asd aubal Jed. Analey regarded hU two companion* with sidelong curiosity. He could not recognise Columbine, and he could not tell whether Fell was speaking of the scarf and Jewels In Jest or Such hUtoric things were not uncommon In New Orleans, yet Ansley never heard of these particular treasures. However. It seemed that Fed knew their companion, and accepted her as a fellow guest at the MalUard bouse. -What are you doing out on the streets alooe?" demanded Fell, suddenly. “Haven't yon any friend* or raUdves to take care of your Columbine'* laughter pealed

T have bean mingling with the dear crowd* aad enjoying them, before I go

“I have every reason to bcileve that he wOL" **ld Jachln Fell, gravely.

grid, determine tbe value of E. E Is tbe negative potential which must be applied to the grid In order to reduce the plate current to aero. The value of F, which la the positive grid potential that wlU cause the maximum or saturation current to flow In the plate circuit. Is also determined by the relative position of the grid with reaped to tbe filament and plate. If the grid is of very flqe mesh, tbe value of E la small because tbe electron* In passing through the small mesh of the grid on their Jonruey from the filament to the plate will negadvelT charge the grid and wUl be repelled. Similarly a small poslLve charge ap piled to a fine mesh wUl tend to accelerate the velocity of the electron*. In case of a very coarse mesh grid, the electrons can pass through the aperture* In the grid without coming in so dose to the charge on It an' relatively high potential will be qulred on the grid to control the electron stream, or In other word*, the current flowing In the plate circuit. Referring to Fig. Tin. O-Q. la the torrent Uytt will flow In tbe plate circuit when there U no potfxulal applied to the grid. Suppose a positive potential as O-I Is applied to the grid. - The corresponding plate circuit current will be I-D or B-D, more than It was shea the grid had no potential apA negative potential of O-H ts nvw applied to the grid where O-H Is «qual In value to O-L hut opposite In sign. The application of the negative potential when applied to the grid will the plate current to be reduced to a value H-C or A-C. lea* than It there waa no potential applied to the grid. So It is seen that a potential when applied to the I not reduce the plate circuit ti much as the same positive potential Increased the plat* circuit current. This irrtgufcr conductivity of the tube Is made use of when the tube la naed a* a detector or rectifier of

make* the three-electrode vacuum the most sensitive detector available. In actual tubes the point “G" on the characteristic curve* aa shown In Fig. Till and Fig. IX may not fall on suet a point of the curve that symmetrical changes In grid potential will cause a symmetrical change In plate current, starting with zero potential on the grid. It then becomes necessary to apply ’a constant potential to the grid by means of a battery In the grid circuit. celled the “C" battery, to maintain tbe grid at such a point jn the characteristic curve that mmetricul changes In grid potential will carte the maximum aymmetricul current to flow in the plate circuit.

U® Daddy‘s EpdEveixirxa Fairy Tale u fjy/'WYG&AHAM BOWER

SHARKS AND CRABS “There are sharks knswn as Ray*.— said Daddy, "and there are sharks known as Skates and they're both supposed to belong to tbe Flattened Shark family. “There are Common Splned Dog-Fish Suarka, and there nr# Ground Sharks. “There are Sleeper Sharks, who like It where the water is very cold, and there are Baskins Sharks. And there are Ham-

Prettiest."

put

hand to her

on the roof of his drotgnatsd victims and mads his getawnj *® '*■“ roannsr—by airplane No nu had ever been *«■. waa believed by some, booted at by 0t Doctor Ansley glanced *t hla watch, and deposited hU cigar in an ate tray--We'd be« be moving. Fell. Tool. want a tomlno?" ITU •* bore In a

throat and shivered a trifle.

“Ton—yoo really think so? Too are not trying to frighten me?" Her voice wag no longer gay. “But—tbe Jewels— If they are taken by the Masquer—' -In that case," said Fall, “let the blame be mine entirely. If they are lost little Columbine, others will be lost with them, fear not 1 I think that this party would be a rich haul for tbe Masquer, eh? Take tbe rich man and his friends—they could bear plucking,

that crowd 1 Rogues alt"

“Confound you. Fell 1" ex d aimed Ansley. uneasily. “If .the bandit doe* •bew up there would be the vary devil

a seriously think that note Is 757 shrugged lightly “**•• kn ^*! Ha not worried. MsliUrd car afford ’JjtoST*." calm oner Analey chuckled. “Oh. I believe tbe prince A tonight. You's-e met hbr.

-No.

Heard something about him.

erlcan. Isn't be? They

w b«» become Quite popular in t0 Ansiey nodded. “Quite a fine ruTmotber was an American-ahe married tbe prince de Grrmoat. wto ternstlousl affair of tbe pnat genera turn. Da Gramcwt led her s dog s life, i htar until be waa killed In « doeL She lived in Paris with the boy wm. him to school here at hotr.v^snd he was st Tal* whan tbe war broke out. be went back to serve bis tteto^ -Still, ne’e s* in*rt<** 0o '' * SOT O'— '“ 1,1

Big Ships' Radio. Tbe radio equipment of the ahlpi Paris and Lafayette Is described in a recent Issue of Radioelectricity. On both steamer* a fire-kilowatt tube transmltte. has been Installed with a wave range of between 2.000 and P.tttO meters. A five-kUowatt motor-generator set U used to produce the plate-high tension for four rectifying and four oscillatory tubes, and the low voltage current for the heating of the filament heae tubes. Both vessels are equipped With a radio range-finder, or “radio goniometer." white, reduced to plain English, means a radio compass. A distance of 8.4C0 kilometers has been covered safely by meaaagea sent from the transmitter of the Parts.

Radio for Animal Training. Experiments with the radiophone aa an 'aid In animal training are to be made at the Hippodrome. New York city, by George Power, trainer of the elephants, to determine whether It wOl be possible for hi* big pets at some future date to execute his orders on tbe stage while tbe trainer himself Is absent.

wbgrt a lady, a gu**» •« tka White House at lunettoon. etead the lata Car* dinu, Gibbons whether be rawUy believed that the pope was laftlllble in all be raid. The cardinal am'tod and answered: “1 cso only reapond to that, madame. by aajlng that when the pope bsd* me good-by tbe lost tune be so hi, ‘Addlo. Cardinal? Jibbones 1* "—Maurice Fraoc-a Egan In tba Review of Reviews. ^ Circular Slid* Ru«a. A circular slide rub- that roc be carried in ft Wat pocket I* toe Invention of a Ban Francisco* autu. a magnifying cla»* owing te media* U.

Tbe Incoming radio signal la a high frequency alternating current. Let us apply an alternating difference of potential whose maximum positive value Is equal to O-I and whose maximum negative value Is equal to O-H, to tbe grid of tbe three-electrode tube whose tesracteristic curve Is tbe same aa that shown In Fig. VIII. In FigIX la shown the alternating difference of potential applied to the grid. Through the first quarter of a cycle, from zero at J to a maximum negative rclue at K. equal to O-H. tbe plate circuit current will vary from O-G. its value at P when no grid potential la applied to a value at Q equal to H-C. During tbe next quarter of a cycle tbe grid potential changes from a m»rim,ini negative valne at K to zero at L. Tbe correapondlng values of plate circuit current are shown by the portion at the plate current curve

Q-R-

During the next or third quarter of a cyde the applied grid potential rases from zero at L to s maxli positive value at M. equal to O-., and cause* the plate circuit to Increase from I-B. its value when tbe plaUr potential la aero, to I-D, crease in plate current equal to B-D. During tbe remaining fourth quarter of n cycle as tbe applied grid potential varies from a maximum positive value at M to zaro at N. tbe plate drcult current varies from a vali

to T.

Assuming ihrt the chanct eristic curve as shoa-n In Fig. VU1 and Fig. IX wae with a potential of 40 volt* on the plat'-, then. If the plate cunent Is to be reduced to aero by a varta- i S tlon <tf plate voltage—with no poten- ! J tial gpplied to the grid—the plate ; • voltage must be reduced to zero or c : * rwUction « 40 volts must be mad*.

-New Sharks live In all kinds

of waters—In all (Mrta of the world, but dangerous ones are not about where we are, for they are ante enormous fishes nnd they want to be

where It ts wlldet

"Mr*. Shark cone* to a shallower water when the eight cr nine little Shark* (If w* can apeak of them an little Sharks) come Into the wostd. "They also travel about after blooflsbea and other kinds of flsbee they want te bare for their breakfasts and dinners and suppers. “Tbe Sharks tbrt are along Mnerican coasts are hsrmlesj and mostly they belong to the Dusky Shark family, a family of Blue Shark* “Oh. there are so many families of them! And ante strange names ns

they have I

"There are any number of other Shark families whose names I have not mentioned, ante as the Nurse Shark, the Smoo b-Tcatbed Shark, the Hound Shark, the Fresh-We ter Shark, and many others. “They are very, very big. bat as I*ve never seen a Shark I cannot tell yon mote else about them, and I believe I was only asked for half a story about them anyway." Nick and Nancy laughed, for Nick bad asked Daddy to use up half of the story time by telling him Juat j little about Sharks and Nancy had chosen Crabs for tbe second half of the story time. “I don't believe," Nick aald. “that Sharks are very Interesting, “but It seems funny to thlrk of Sharks trav-

eling about."

“Yea." aald Daddy. “I agree with you. for I am sure If I were tbe sire of a shark I wouldn’t want to move myself about, for It would be too mute of a job. “Of course all Sharks do not travel about, but some live always where warm and cool waters meet where they can find tbe food they like beet. But, dear me. we are using up more than half the time talking about

Profeaaor Bell a Radis Fan. Finding tbe telephone, his own In-

vention, a source of annoyance to him, Alexander Graham Bell had It removed ffrom Mb home. With the radiophone there la a difference, it seems, for Mr. Bell, now seventy-five years old. Is Bald never to tire of “listening In" and experimenting with the new device. There are few more ar-

dent enthusiasts, declare his friend*.

-I dort mind." said Nancy. “Well, we won't waste another minute on Sharks." Daddy said. “'Hello.' said Mr. Horseshoe Grab to Mr. Bock Crab, 1 am very happy In this pleasant basin. “ 'Of course If* not Uke a basin that can only hold Jnsi ao mute water. Mine clanges when the tide comes la at id goes out. Sometimes I have lens of water and sometimes not so mote. "But I am safe, for though I have a queer shape and look dangerous. Fas not good to eat I'm thankful to My.’ “ T am,' aald the Bock Crab. Tea, I am. but still I am not eaten aa yeti’ - Ta> about the smallest of the said the Sandbag, ‘bat I can get about and have a good time, not alow la way I move

RADIO DON’T* Don’t expect the circuit to oecillate with equal strength over a great range If you tune tbe grid circuit with capacity alone. Keep the ratio of L to C aa near constant as possible while tuning. Don't expect a rirtult to oscillate if the nature! period of the tickler circuit Is equal to the natural period of the grid

circuit.

Don't place the tickler or plate variometer tight against the grid coll or ■ change In tbe pUte circuit will detune the grid

circuit

Don’t expect high Impedance tubes to oscillate freely in a circuit designed for low Impedance

tubes.

Don’t discard a regenerative receiver until you have tried more than one detector tube. Ikin't forget that a soft gaseour lube is the best detector, and that a hard tube la tbe best oscillator. Don't treat Inductance colls with shellac or any other varnish or compound 'hat will absorb wolature.

1 am the tlest of all.' said tbe Lady Crab. 'How I love tbe sandy ground under the “I'm About tit* water. Smallest* " 'Yes. I am a great sand lover.’ “•Well.' Mid the Eoraeshoe Crab. T think I am the luckiest of you all. for I look as though I were quite dangerous and I am not good to eat “That Is pleasant yes It 1* pleasant.’ And then tbe Horseshoe Crab aald. - T hope ther’U kvep ubs •• "Or. the different crabs. - 'And wUl remember that I “ ’Am no good to eat or to burl*"

RIDDLES

Why does a woman who gives her husband “a piece of ber mind" usually take aa much aa she gives’—Because ■be generally manages to take away the peace of his.

What l* it tost Uvea In the winter. re in the auminer and grows with * * lu root upward?—Ah icicle.