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Show ( fl I ... . i HHHHJ H POPULAR SCIENCE H Prevents Gas Escaping. The well-known principle of expansion expan-sion under heat and contraction under cold has been tit Hired by Louis F. DucUcr, of Boston, Mast., In designing design-ing the automatic ( tit-tifT for gas hut tiers. ti-ers. He says this burner will automatically auto-matically close the vnle to proton leakage In inse the flnm In accident ally extinguished or tho How of gas Is Interrupted for a shoit Intcrtnl. To accomplish this end a ine'nlllc collar Is attached to the bun cf near tho tip, ono end being connected with a vertical verti-cal rod, lending downward to a pivoted block on the Jet aim. On top of this arm Is placed n hltdlng bolt, which Intel In-tel feres with both the pivoted block nnd a des on the talve Key when theso Automatic Cut-Off for Qas Burners, two members aro In a certain position. The bolt Is normally forced toward tho tip by a colled spring, but It Is obvious that when tho block Is In tho way tho rod Is held In position to engage the dog on the cut-olT key. This can only be done by expanding the collar sulll-clently sulll-clently under tho heat of tho llamo to maintain tho block In lino with the end of the rod, and when tho llnmo Is extinguished tho contraction of tho collnr turns tho block to ono sldo and allows tho rod to draw back from tho dog nt tho opposlto end of tho Jet arm. As tho key has a Bprlng to closo It when tho dog Is released, It Is plain to bo seen that this action will Immediately Im-mediately take place, thus preventing further How from the Jet. Useful and Ornamental. A now table Is being shown In the furniture stores which could easily bo duplicated In less exponslvo materials ant. placed In most any room ln the house. This tnblo Is designed espo-clnlly espo-clnlly for photographs and will fill n long-felt want. It Is about as largo as the old-fashioned work tablo and llko.lt, hnR a top which openB, disclos ing a box Inside, which Is divided Into compartments of different sizes for tho reception of photographs. Tho top Is of plaited satin brocade, so arranged ar-ranged that plctutes can be poked In here and there, and when opened tho top forms an ornamental background for the photographs. Formation of Ocean Basins. Soundings have shown that tho ocean basins are comparatively steep Bided and flat floored. The grcntest depth yet found Is 31.CH feet, In the western Pacific, near tho Island of Guam (latitude 12 degrees 4G minutes north, longitude HEi degrees 4G minutes min-utes cast). Another placo of great dopth, 30,930 feet, is in tho Pacific, near tho FIJI Islands. The deepest Bounding yet made ln the Atlantic Is 27.30G feet, or over five miles, In a local lo-cal depression 100 miles north of Porto Por-to Rico, West Indies. Pipe and Not Wrench. Tho convenience of a wrench with a slmplo Jaw operating mechanism and rapid means of adjustment In any of Its several positions Is understood by thoso who hnvo occasion to uso this tool frequently In their work. Tho ono Bhown In the accompanying Illustration Illus-tration seems to havo special advantages advan-tages In this direction, as Its parts aro few ln number nnd extremely easy of operation. ' Tho loose paw Is limited In its movement hy tho length of the slot in tho top of tho bar which carries car-ries tho Jaw and by slipping tho pivot pin from Its seat tho two jaws and controlling lever can bo separated. As will bo seon, tho Inner end of the lever Is provided with a scries of teeth, which engage the teeth of a rack In the bottom of the slotted arm ot tho loose Jaw. My tilting tho lover up- Lrvtr Controls Movement of Jaw, warii and ove- toward tho front end of tho ilot tho looso Jaw Is froo to slide back and forth and when adjusted ad-justed In position to fit any nut the re-verso re-verso movement ot tho lover tightens tho Jaw by tho engagement ot the teeth with the rack. As soon as the lover Is seated In tho slotted arm It affords a firm handlo for turning tho nut. As the faces of tho jaws nro corrugated they afford a strong clamp such as Is essential ln a plpo wrench. William J. Qulnu, of Saranac, N. Y Is tho Inventor. Bogus Meteorites. Genuine, meteorites aro curiosities highly prized by museums and scientific scien-tific collectors. Piof. St. Mcunlor ot th'j natural history museum ot Berlin j nld ns much as $5 pur gram for a me j'HHHH teorltes. It Is therefore conceivable HHHH that sharp piactlces should be lcsort , cd to by dealers In scientific curlnnl 'HVBH tics. A hand of meteorite counterfeit- HHHH ers w.is recently raptured r.ud coiiRld- HHBH crnblo evidence obtained of verj curt- HHBH ous and Ingenious methods of dccclv- HHj Ing the giilllhlo collectrr Tho inui- fwBH hers of this band were Corsler.ns. It i'HHHBJ wni their practice to obtain natural HHHB lock resembling meteorites as closely HHHB as possible and then to burn them In. , HHHB order to produce the black crust which ' HHHB Is one of the qarmnrlts of every genu- HHBBI I ik meteorite. The pieces ot rock wero- HHHB coated with lampblack, dissolved In I HHBB molten sulphur. It seems, howover, J HHBBI that this nc'.liod was so crude that I BBBB the deecpt'en wai easily discovered, i HHBBI and the men were forthwith arrested. j HHHB Comet Tcmpel-Swlft. i flflflflflj The comet dlscoveied by Tempel In ' Bflflflfl ISfi'.l will be ngalu visible (In tole- Bflflflfl scopes only) In September ot the- present jenr. It was seen In 18G9; I a In 18S0, eleven cars Inter, and In I H 1801, eleteu riirs after 18S0. It re- tohes In nil elliptic orbit In a period f j M of live and n half ear (2,001) dayw Jl HHBB exactly, or lite ears, 1S3 days), and , returned to perihelion In 187S, 1880, i B nnd 1S07, but was seen In none ot ' theso years. Tho reason Is simple. BHHfl Us oi bit Is so situated thnt In the HHBB latter group of returns Its distance fHHHJ was about 192,000,000 tulles, whllo in 'HHHJ 1809, 1880 and 1891 the distance was j HHHJ about 9,000,000 miles. The dlrfctenco wHBU of illstimces produces an enormous nHBflYJ difference In brilliancy and accounts vHBHI for Its Invisibility at alternate, ro- HHHJ HHHJ Soma five years ago M. Lo Bon an- i HHBJ nounceil that wnen light felt on ono HHBJ sldo of certain bodies a thin metnl ' & plnte, for Instnnee, -tho other, unll- HHBJ lumlnntctl Bide ot the plato gavo out HHHJ non-liiiuliioiis radiations, which wero HHBJ Inter shown to bo Identical with cntli- HHHJ ode rays and which arc now bcllovod HHBJ to be made up of elements ot atoms HHHJ carrying an electric charge. Tho HHBJ radiations nro analogous to tho X- HHBJ rays, and to tho rays ot radium nnd HHHJ traverse thin plates of metal freely HHHj and discharge electrified bodies ln HHHj their path. Similar ellluvla aro pro- HHHJ diiccd In n great number ot chomlcat HHBj reactions, and tho phenomenon Is, In HHBj fact, ono ot tho most common In HHBj 'HHHj Self-Opening Pocket Knife. HHJ With the majority ot knives tho HHH henvy spring necessary to hold tho blado In either position makes It dim- ' cult for a person with weak Queers to HHH wwt,."Hii.liw.. .TSwriQr HH Pushing Button Bares the Blade. HHfl open tho kulfo, and many finger nails HHfl havo been broken ln fulfilling tho re- HHJ quest to "ptenso open my knife for HHfl me." In the plcturo Is seen n neat Ira- paa provement In tho manner of adjusting the blades of a knife and holding them a In place. Tho blade In t.ils now knife J would Btvlng pirfectly frco wero It not for tho Bplrnl spring connecting tho shank with tho central pin of tho i handle. Tho tendency of this spring HHfl Is to throw tho blado open, as It Is al- , HHfl ways under tension nnd pulling on the, J shank beneath tho pivot pin. i J To Clean Brass. J Brass bedsteads and other lac- paH quercd brass furnlsnings which have bH lost their luster may bo restored with . HHJ a lacquer made of ono eighth ounce HHJ of powdered gambogo, ono ounco of IH pale shellac, one fourth ounce of capo HHJ aloes and a pint of alcohol. Put tho HHBB IngiedleutB Into a quart Jar, and when IVfll they ate dissolved s'raln tho fluid i-BB1 through a thin cloth. Before tho var- fl nlsh Is applied tho brass must be per- (HHJ fectly clean, and, it possible, warm. IiWHI A soft varnish brush will answer for HHJ the work. If ono does not want tho HHJ labor of applying tho lacquer a furni- HHJ tore man 'can bo hired to do It. Even HHJ In that case there will bo a saving or HHJ expense In not sending tho articles HHJ away for treatment. 5HBJ fa New Galvanic Cell. JHVJ A Gorman electrlcnl Journal do- ' BH scribes a new galvanic cell which "In- ' BBJ hales" tho oxygen of the nlr. Tho cell ' 'BBJ contains in a saturated ammonium 'HBa chloride solution a zinc rod and a por- flH ous pot provided with a semi-porous IflU membrane. Within tho porous vessel HHJ Is placed n retort carbon, and tho ves- HHJ set contains a special dopolarlzlng M liquid. This depolarizing liquid con- '"" stltuteR a sort of chemical spongo, , flVJ which, when In tho air, absorbs tho iwfll oxygen thereof, and gives It off again HHJ In the process of depoplarlzatlon. The ., '-H dopoplarlzer consists of ammonium N'rVHl cu prate. iX'H Prevention of Melds on Cigars. 'HB Tho United States Department ot iB Agrlculttiro has Investigated the rWfll cdiiEo and prevention of molds on MviwJ cigars. Tho molds do not grow on '1lH1 tho leaf until after the application of 'HVJ tho thin film of trngacanth paste used cHJ for fastening the wrapper In placo. Tho euro consists In sterilizing' tho ' ;ffflfl pasta by using a saturated solution of uHJ boraclc acid in making It up. Tho :;l procoss npocars to bo perfectly- sue- ' flU ccssful. v .9fll 'VlflHj ' x, n ' jHHJ ..ftjflflflj " v,. 8 ii&lHj a . :, & WM JgMflB'flflflfl |