CAFE KAY OOOTTY mi*#. 8«A I8L* PITY. H. f.

bU own re#pcc#lbUltj ? He turned rwlftly to hta mother-tn-

Uw and said bufldly:

-Call some on* to get this chad ixne dry cloches. Take anythin* <* Ere's you can Bnd that will keep ‘ warm, and foe Ood's sake, take tl ras*ed boot* off her feet r Be api j the bell, “ni order the team.' When be bad given hi* order* to who appeared at the door, be

kck into ‘

thrmich hi* nrml. hi* thooetits flew to the squatter'* hat where U* frail young wife awaited him. - "Come along quickly." be said, going directly to Polly. How changed he seemed, bow gentle be we* as he took bold of her arm end led her away; and *o preoccupied she with this thoucht that the beauty of the clothes which she wore made no impression upon her. She wondered dully when MacKeurie lifted her bodily Into the sleigh and the coachman chirruped to the horses. Jam what he Intended to do aith her to-

morrow.

She looked back upon the time the authorities bad sent Meg Williams to a reform school and also-recalled the girl'* home-comuig after her term bad i served. No* that she, herself!, was In danger of the like treatment. Polly op searched her mind for the details that Meg had given of the horrible place. As the horres trotted along the boulevard. Pollyop'a chin sank Into the warm far about her cede, and until they tamed Into the narrow lane from the road, no one spoke a word. “Go straight to the lake. Bank.' Ordered Mackenzie, and at the sound of hb deep voice. Pollyop felt another She had beard It so often In strident abuse! Now It s actually pleasant to listen to! Down the hiU through the furry rw the strong horses picked their way. Once the cutter nearly turned on Its side but righted itself. The Hopkins but was dark when they drove up before It. Marcus jumped Into the snow, picked Polly out of the cutter as If she bad been a kitten, and waded through the drift to the narrow |ath leading into the house. He put the girt down before the door, and turning, called to the coach“Drive the team down the rood, Hauk, out of the wind! PI! call you I want youT as Pollyop'a trembling hand that unlatched the shanty door. who struck a match and touched it to the'candle. Ttien she pointed to .Granny Hope’s mom. “She’s In there, mister." she said, trembling like an aspen leaf. ~ ‘*e was about to face an outraged wife In the presence of a pow-rful husband, she sat down, shaking with fear from bead to foot.

VACUUM TUBE USED AS RADIO DETECTOR

How This Device Depends on Emission and Control of Electrons for Its Operation. Reader* of the radio column an urged to dip each article and paste it in a file book. The articles printed are continuous and ike entire series trill be valuable for reference. The greatest advene** made in the past few years In the radio art have been doe in one way or another to the use of vacuum tubes. In view of this fart a more careful consideration of them will be of InterestAll of these tubes, knewn by a variety of names, such as radlotron. audios aertotroa (trade names of the manufacturer) deixnd upon tbe same fundamental principles for their operation. For the sake of simplicity of brevity these will b£ referred to in this column simply as vacuum tubes. A vacuum tube can be made to function as a detector, aa an amplifier, or

as an oscillator.

The vacuum tube depends on the •mission and control of electrons for its operation. Tbe electron Is the smallest subdivision of matter which mankind recognises and it carries the smallest known charge of negative electricity. For years twevlous to elect .-on research it had been held by •ctaatist* that matter was baUt up of distinct particles or units which they

ed by « battery current and It Is this beat furnished by the battery current that constitutes the force that disrupts tbe atoms of the filament and liberates electrons Fig. HI I* a spherical glass bulb from which all the air and gases have been exhausted and having mounted in it a filament C-D which can be heated to Incandescence by the "A" battery connected to it. and the metallic plate E. When the filament C-D is heated to incandescence by the “A" battery connected across its terminals electrons are emitted. Connecting th* cold plate E to the Incandescent filament C-D by means of tbe circuit B-F-G-H which Includes s current meter and a “B" battery, with its negative side connected to the filament lead at H and Its positive aide connected through the current meter, tbe plate becomes electrically positive with respect to the filament. Since like charges repel and unlike charges rttract. there will be ■ movement of electrons from the filament to the positively charged piste, and the current meter will show a deflection which Indicate* that a current la flowing In the circuit E-F-G-H. increasing the “B' battery voltage causes an Increase In tbe current flowing in- the circuit E-F-G-H. the plate circuit, until the positive charge on tbe plate E Is so strong that aU of the electrons given off by the filament are attracted to It. Assuming that the temperature of tbe filament la kept constant and that the plate voltage has been Increased to the point where all of the electrons given off by the filament are attracted to It. any farther Increases In the “B" battery voltage will not cause any lathe cu-rent la tbe plate cir-

cuit.

Increasing the temperature of the filament will Increase the total ntoaher of the elec Tons emitted.

FRISCO TALKS TO HOHOLULU

at the Pr—I—

tlcally a* MacKenzle thrust up nls hrnd sod clutched tbe slim brown fingers. -Tell me something ebont It while be whispered. Pollyop shuddered. -Wen. sir." she began, no low that

—acKetu

hear, “all the squatters bate yon. but nooe of 'em was wicked like me. I said. 1 did. that you couldn't be hurt no way only through your woman, an - | was goln’ to cut bfer bead off the ax an' then sling ’er in the . ... _ *** meat “l* for year*, but l Jest had to come and

11 yon."

Before MaeKensle. aghast at the danger his dear one had faced, could answer. Mrs. Robertson entered, followed by Evelyn's maid. “I'll get «y «mt-" exrialmod Marcus. Jumping up. “Drem along Beriya's fur

CHAPTER XVII In the meanwhile a covered carriage containing two men and a little boy making alow progress along the drifted boulevard. About twe milea double cutter, with

by them,

the little light on the back of It glowing like a steady red eye until a sharp the read blotted It from sight, body else out. If tis a bad night." commented tbe older man. who rid the boy. "They went awful fast too. Daddy murmured the child. “Didn't •am, dartin'?” -Tep. son,” was tbe reply. “Slrigtis go over tbe scow better'n wagons" Tbe words hardly penetrated the younger man's livery. HU though is were busy with a squatter girt who would nave a real Thanksgiving tho next day. Her Joy be could picture, hot be could not Join It All Ms thoughts of her were marred by another vision that poisoned bU every moment. Never since be had found •ear Bennett dying in Polly's bed bad i known a peaceful Instant When the veMcla came to ibe cot-

magnificent

inruout bad swung Into tbe lane lead- _ of squatter shacks at tho lakesioe. Robert Pereira I ofiened the carriage door and thrust bU head

When be settled again U

“U* a bad night Hopkins, bapa It would hare been belter to bare

called electrqps. The apparent mam of an riectroe U about ooe-eigtateen-hundreth part of that of an atom of hydrogen wUlch U the smallest of the

the electron theory consists of a definite t

nucieua haring a positive charge so iocc uooe of the comp* electron* are driven from the atom, the Utter possess no detectable charge. The positive charge on the nucleus U said to be exactly neutralised by the negative charge* on t

be installed on a number of Important German express .rain*, and recelviaff Instruments will be placed U. hotels and embassies, according to an anncement made recently. Erperiits conducted In a moving freight car hare shown that the wireless ay*teir works writ tbe men engaged In the testing of the Instruments being able to hold conversations with friendi In Berlin. Tbe tests were made under the observation of engineer*, military attaches and the diplomatic representatives of the United States and Sweden.

Handling Vecwum Tube*. When you handle the vacuum tube*

A furtive smile curt ad tbe maid's _^ts as she helped pn'-i off JeremUh's heavy coat, and tteu grew broader as Pollyop riippej oat at Daddy*

herself as she dried the wet feet and attired the squatter girl In her

^ _ bosky tbroet anood. Then the' brown, fearful wyes travelml w

in the Slum City, to be loved and comforted. 1 not your woman in my •back. ,*M P.J1/-A rirslght » W». “^od be thanked." screamed Sta. I In MsrKenrles g he Oared be

TocYe very Slue, girt," asked MrsObertsoo. “that my daughter's safe in your shack? therer puUy remembered Larry Bishop snd Lye Rraeger. She had been I astro

not be her frieoda. take tbe blame'. -I wheedled 'at there, ma'am.” she replied humbly. "I’m grin' to tell her man all about Marcus entered sod stalled hack a* be tsngbt night of Potlr. How beautiful she was. bedecked In hU wife's W Th In her rags she bad had a distinctive loreHnea*. Both Boh and E*e-

Twould - re-a a snowstorm to keep me in Ithaca all night." he returned, “•'hero tay protty bryj*. I

he did »o< alter aloud ta* thought which flung to Us I'-ps the* be was tonuivd by th# suae wish, to* What be did say was: "Yok? daughter will be asleep, I've > doubt." "Mfbbe," Hopkins answered. “But PoUyop'll be glad to bo? out of bed for her daddy an' Jerry baby!" Then be roughed as If trying to add nuethlbg else. “I been wantin' to tell you aU day, Ir. Perrival." he said awkwardly, bow grateful 1 be to you. It's kind* iiard to say It In words." “There’s no need. I assure you.’ turned Robert. “The only thing 1 grot Is that you should hare been < twllrd to stay In prison to long." “But we're b.me now !" was the hapanswer. "An' I'm thankin' you for am an' my brats too." “Pollyop." squealed the child, wriggling. “Daddy. Wee Jerry want* top.“HuslL Jerry.” triethed Ms f* “We're s-cornin' near home now.— There! Here we be." As they des.vnded from the carriage, tbe beby hid Ms face hi his big father's shoulder (TO BE COKTIK 'ED )

Suppose now that by eomt means an electron can be detached from the atom. Then the atom becomes what U known as a positive Ion and It exhibits tbe properties of a positively charged body, or in other words since an electron wMch carries a negative charge has been removed from the which ha> equal positive and idve charges, the portion of the

about or that the elements are broken. These little lamps are the heart sod soul of the sat. A good way to operate these tubes Is to keep the glow Just a little below toe critical point

June—Is v-.ur dog Intelilgvnt?

of necsties charge and acts like any positively charged body. On the other hand if some force can be brought to bear that win add an electron to a normal atom which is neutral as far as electrical charge* are measured, the result srtll be a negative ion. which will poasees cl! the properties of a negatively charged Sod/ An a'.ew then which ha. a deficiency of electrons Is called a positive ion and one having excess of electrons is called a negative loo. Since each electron carries a (stive charge of electricity an electron represents a cem'o quantity ot electricity Forcing electrons to move from one point to another rouse* electricity to fl»*w. The ability of any Bedlam to conduct electricity or allow ® current to flow through It depends upon the number of freb electrons available as carriers of charges. It has been known for many y« that i he space surrounding a piece ri Mated metal U * conductor of elortricity. It has been demo:istrated more rteaatfy that this Is doe to tbe re.tasc of electrons and that If an Incstidrsceac asocial he place.! In a bulb exhausted of •!> »■*•- P ur * troi>« vril) be liberated from the In-

caud-weent metal.

In a vacuum tube such as we are asliig at tbe present time, the piece of me.a! used to furnish the electrons ta calked tbe filament and Is usually made of tuugstMi and sometimes is i coated wit* oxides to Increase the I etortroa emiwduu. Far convenience

; the filament of a

ADVICE FOR AMATEUR*. The voltages applied to the plate circuits of amplifying tabes are not extremely critical und one voltage control will suffice. Tbe <!Hector tube, however. Is often very cndrol and an efficient potentiometer wlU work wonders In coetroUlh* It. Apparatns used tor the reception of broadcasting is exactly the same aa that used for the reception of code signals. Th# transmitting equipment, however. is different. Tbe nse of a single wire for recaption is advantage.ms because !t lesstni the amour: of objections! Interference in the way of static. It Is eqn Uy as good as a multiple wire system for reception. Defective "B“ batteries win often rouse roaring in the tde-

The electron often talked about Is tbe smallest known quantity of negative electrical energy. la motloa It makes up the electric current. A “soft" vacuum tube Is used os a detector tube end a “hard” vacuum tube as an amplifier The terms "hard" snd “soft" refer to degree oi evacuation. Radio wares travel at tbe same speed as light, namely 1S8.000 miles per second. A wsvemeter Is nn Instument used for checking up the ware lengths of sending and re-

ceiving stations.

Gas pipe or water pipe «ystems may be used for g.'iund*. the latter being more advisable Lightning protection secured h* grounding the antennu when not in use Is essentia! and Is required by tbe underwriter*,

tube Is bast- ""-“***“*****“““**'