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Show i ii 111 ii i II lliiim in Mtipii N) ilm T i; POPULAR SCIIENCE I g Technical education and Trade. Y ! .;l.l Mini! III 111.. Inllu. I,, , (if t.. li.ii ill i'iIih ntlun Usui lra.1v haa lately b-cn nun Ii dlai-usscd In Kim-liiml Kim-liiml Tut president nf the Society nf t'hcmlcnl Industry In Liverpool Kites some of the rcneone why tier-many tier-many la now advsnilns an rapidly, as follows: 1. HtiMrlcir reouotny. thor-oiiK'anesa. thor-oiiK'anesa. attention to detail. 2. The lic-scsslon of a laiKe number of mri trained not only technically, hut llh-tally. llh-tally. 3. A i lime alliance of legislation legisla-tion ami of science with the interests 4if traile. 4. A national system ot ' rinlwuye and ranala. U. t'lienp skill-rd skill-rd labor working; lone; houra. II. A hircn supply of unskilled laborers already trained tu habits of order atii! discipline liy army service. 7, Protce-tivn Protce-tivn tanfTs. ft. A good system of pat i'lit tawa. He prorcs those retnedlea for KiiKlnnd. 1. Tho appointment of a minister of commerce. J. Tho nntlniuillr:itlon of nillwaya and can. ala. 3. Tho egtetialoti and Improve ment of secondary education. 4. A reform of patent lawa. T ic gueatlon fllneiiHKed la acute In KiiKlnnd, and It la not without Intercut In America. Tho remeilli a proponed urn nut at all needed here, and to some fit tuetu, a: least, consent could not now bo olv tulned. filers Recorded by Photography, Tho mimhcr of Ktnra recorded on a photoKriiphl pluto depends nut only oa tho region of tho heavens to whlea tho teloaeopo la ulreeleri, hut on tho loiutlb of exposure. At the Donn ob-erratory ob-erratory a map of tho aorthora hoavona waa lusdo showing every tar elalhlo la a assail toloseoee of about three Inches aperture, if W( rail the number at alara shown oa this map unity the Greeewlca phots-graphs phots-graphs with an eleyealnch toieecope a how that In tweaty seconds three and a half tlmea aa many atara are reeoTded: In ! mlnutea If teen and a baa tlmci aa many, and In forty manalos seventy-three times aa many. I)y Increasing tho oiposare nor itara are visible, but the la-create la-create la not Indefinitely great. 8o far aa thcio observations go ther abew either that tbe number ot atari la not Ir.Smto, or that the light ot tra Ii absorbed In apace. Electromechanical Clock. In an electromechanical clock, the combination with a clock-train, of a flu i--ir normally alatlonnry contact-arm, moans for actunlluii aald arm from aald clock-train at predetermined Intervals, In-tervals, a plurality of contact-pine In the path of snld arm, an eloctrlc bell In circuit with aald contact arm and pine, whereby an lntonnltteut alarm ! sounded at prcilotermlnod Intervals. Thomas E. Hector, Bt. Louis, Mo., Is the lnrcntor. Jevrclors' Circular. The Question of Fuel, Every ouo Is familiar with discussions discus-sions about the rate at which the world's coal supply la being exhausted. exhaust-ed. Attention may be called to the posBlbllltlca of wood systematically cultivated for fuel, llelmholts snowed snow-ed that In Ciermany tbe thermal value ot the vet;. liable growth on a given E, area of land la about M477th part of the hent dellvored by tho sun to the same area. l)y planting rapidly grow-j grow-j lug timber In tropical countries the Oerman rate ran he Increased about i fifteen times so that about one per cent of the thermal energy poured . 1 npon tbe land by the aun may be jf etored as wood fuel. Taking 4,000.- f OdO.OOO acres or land as available for forest cultivation It followa that ' perpetual fuel product of thirty times ' our proscut roul supply might be securod. And moreover, la It hope-I hope-I less to expect that a way will be . found to store the energy dally re ceived from the sun and to do away ' with fuel altogether? r Electricity, The latest word on electricity la to the effect that It la a material iud-1 iud-1 stance. Its unit, the electrone, forms !- an Infinitesimal part of the atom of any element, and when split off It produces a strips In the other similar to that due to negatively eloctrltlod body. Tbe severing of Uie electron i from Its atom Is the generation of , electricity. The remainder ot the I atom acta as a positively charged 1 body, but It Is not certainly knows i whether the positive electron sup- r posed to be nbout ten timus as heavy , as the negntlvo really exists. I New Egg-Testlna Method. 1 A Gorman Genius auys he haa dis- i : covered a nnllu.il by which ho ran tell the ago of an egg up to flvo week! ( from the time or hiitcliliiB, Indicating I not only whethor tho ecu Is nt to eat or not, but lno teat lug egg for hatch- ' lng purposea much more accurately than ran now bo dono by the raudllng . method. Herewith l given an lllus- ' trillion of the aimtile ai.pariitna which j he iiii', nnd hIk,i the complete formula : for the liipiid in which the leata are ninile. sa given In Hie patent papers tiled In this country The lliiuld ought to he about 1.0.1S apecllle weight, and la rompoaod of one liter of water, twenty five crams of ordinary an It. eighty Ave grams of glycerin of about 2s degrees liaume, and one gram of concent rntcd salicylic sali-cylic alcohol. A fresh egg. It la stated, I will go to the bottom of tills mixture and lie there In an aliuo-d horizontal ponillon. An egg from three to five dnva old will be nt an angle nf nhout twenty degrees; nn eight day old egg will (leserlhe an angle of forty five degrees; de-grees; a fourteen iav egg. of sixty degrees, and a three-week egg will take a position rorreMpondlng to aev-onty aev-onty live degrees An egg four weeks j old will vtiilnl upright on Ha nnlnted end; an egg of live wueks will be sue-fended sue-fended in the liquid, and an egg be- Graduation Lines Indlrste Aga of Egg. yond that age or a foul egg will swim cs er Bear the aurfuco of the liquid. It these atntementa prove true this apparatus will prove to bo useful for eooklag, preserving, katcblng nnd all other purposes. The glaaa face of the cuatalnkug vessel Is graduated to Indicate Indi-cate the above mentloued degroes. Observations of the Bun. A complete observation of all the variable elements ot the sun Is necoa-aary necoa-aary If wo are to obtain the key to solur phenomena nnd to their connection connec-tion with weather, magnetic elements and other terrestrial matter. The sun's face must nn photographed dally so as to record all spots, faculae, etc.; the entlro chromo-ephore imiat alao be registered, preforably by automatic spectrographs, and tbe radial velocities veloci-ties of prominences must bo determined, deter-mined, also automatically. The spectroscopic spec-troscopic observation! outlined la what precedes are regularly made) at tho observatory of Meudon and nowhere no-where alae on the earth at the present pres-ent time. The spcctrohollograph aaed by Mall of Chicago was not remounted re-mounted when the Yerkea Obaorva lory waa Mtabllaha In IST. nag-land nag-land has lately reaolvod to begin a series of oheorvatloue like thoae of Ucudon and Chicago at two stations tin at homo and one In India. - Mont Pelee Heard In Venezuela. . Tho United Klnti-s ronaul nt Mnra-calbo, Mnra-calbo, Venezuela, tuo inllea from Martinique, Mar-tinique, report that the auumls of tho explonloiiH of Mont l'elco wi-ro heard by himself Hud many otltera, a rnv-olutlou rnv-olutlou v.n In progress In Venezuela and the iiilialiltaiita of ecrluin towns thought tho houimIh due to nrtlllery which was not tho ciihi.. T tin consul's servant, without orders, brought a horae saddled and bridled, saying that he was euro tho consul would wish to go to the city, where a big battle must be going on, Judging from the cannonading. The consul de-cjcribcs de-cjcribcs tho noise as not at all like the roports of heavy guns. It waa not llko thunder, nor the strange rumbling rum-bling of oarthu.uakcs, but as If Immense Im-mense cxplusluna worn taking place high In the air. There ran be no doubt, from tho dates and tlmea, that theso sounds wuro duo to Mont 1'ulce Oil Burner for Stoves. In these (lays of worry over lack of (uol, when people arn wondorlug how they are to best their buildings and cook their food, numerous schemes are being proposed In solution of the problem. Among these substitutes fur coal ore of tho most prominent and successful Is petroleum, and It Is a special form of burner for this fuel which Is pictured below, tlio originator origina-tor of tho Invention being Klmnre Stewart of l.oa Angolca, C'nl. The claim Is mado that Ibis burner ran be used In connection with a cooking or heating fttove, hat-air furnaco, steam and wuter-heatlng system, steam boiler boil-er or hotel range, giving a atrong, hot flamo without danger of explosion. The burner la composed of two eopar-ate eopar-ate parto, ono resting In tho firebox and the otbor forming tlio lid to re Fed from Supply Tank, place tlio ordinary cover of tho stove. Thu lower section tins a central coi l-rising l-rising fn.ui a tint liaxe, v. lib a sue rounding Ihinge high ennneh to pre vent iH.hMliile overflow oi tho oil into tho a.-.bilt helical h. The rover has a centrnl deprv.iulon with a p-'i'loi utlou of snivel. nl l.o to penult the dliili-ping dliili-ping of oil through It ci I be upe of the cone Uw tmih. |