| Show i I I I SCIENTIFIC sd FtC MISCEllANY The heliograph and the wireless tele telegraph telegraph graph would have nn on astounding doni devel opUlent on Mars If IC the surmises of ot credulous people wore vero true Sir Rib Ribert crt ert Hall hail points out that the keenest eye ee cannot see nee ce a n man Inan more thin three miles malice awn the lie best bent telescope will not noi show him more than thun miles off oft ano the object that our most pow powerful powerful io erful Instruments can reveal on tin the th moon must bo as ns large as St Pauls Cathedral The Inhabitants of oC Mars being nt lit his nearest approach to ui us about aboul times as IS far tar away awo as the moon must manipulate a m signal m at 0 least as liS large as Ireland to have IUle It II detected by IJ our astronomers under tin till most favorable conditions possible IJo Ti Tu f freach reach the tho earth with any electric sig signals nals niels nil Is would bo be quite ns as tar far beyond the thu power of ot ally nn conceivable Martians for foi If It It Is admitted that Marconis electric waves can bo be sent over the tho entire earths earth diameter they must have times ns nl great to reach the moon and nod times tunes as great to tobe toIe tobe be Ie perceptible on Mars lIars The new arc lamp of ot Horr Herr Reach Hasch Is la claimed to hare 2 to 4 I times timeR the em clency of or the t e ordinary are arc and 10 to 15 times that of oC the tho Incandescent lila fila filament ment It uses ones two pencils of ot very verb re rO refractory fractor solid electrolytes such nn ns magnesia lime thorla thoria or Is a development from the In incandescent candescent cent lamp ump claiming much great greater er or lighting power lower from Crom the same fame ex ox expenditure expenditure of energy As with the Ih filament the rods rode must be heated be before before fore tore current can pose pass Herr Hasch Easels states that the tho arc between electrodes of magnesia m or oxide ot of thorium has the whiteness of ot sunlight aud amid that by choice of or material light of ot teny color can be lie obtained In th proposed method of ot tooth ex cx extraction traction of If M I nitrous Is III administered and tIme the nightmare of often often ten tIll caused by this anaesthetic la Is charmed away awa by b lively music from a n phonograph It Jt Is suggested that th sense Fame soothing Influence may 1550 lessen thu tho experiences from other anaesthetics like hike ether and chloroform Calcium carbide whose manufacture hns line developed Into a n great within ten years year still finds linde little use Ube except ns as a source of oC acetylene In III Inthe the time last two or three years experiments luse boon been nude mode with It In refining metals It 1 Rives KIel promise of ot becom becoming ing log nn an and economical reducing inc ing agent for tor or separating metals from rom various arlou compounds In the case ot of sulphide te ores which cannot usually II be reduced with carbon except alter after pre Ire preliminary roasting roa the trials seem to have hlo been especially satisfactory lies found that sulphides of ot Iron Iroll copper lead antimony anti magnesium may b be 00 readily reduced the tho table stable of oC calcium re cc remaining In the crucible the th metals metal being liberated and some om of or them vol volatilized 01 Aluminum sulphide alone re resisted slated reduction r M r Louis M ii adds IId calcium C carbide to copper sul suI sulphide fused with blast furnace stag sag ns as asa n a flux and ond readily obtains copper ad nO nn tin Ingot free rC from Crom sulphur the cal col calcium sulphide dissolving In the slIT slag Copper pyrites a x sulphide of ot Iron and ond caliper r gives n a lower layer of copper sharply separated from Crom an upper tipper layer la er erat of or Iron mixed with carbon For ores orts ot of zinc other volatile tIlo metals a n closed retort may be he used us and ond the met metals ale als condensed In tho the usual way amy wa With chlorides anti other ores vari orl variable able results have hae been obtained a difficulty In porno pome reductions being to get rid of ot the carbon carOOn while explosive mixtures with chlorides give che trouble A novel Is III the tho special tea fea feature tore lure of or the hl hi steam motorcar The boiler Is in of oC the hl flash type consist t Ing of ot numerous coils colls oil of or steel tubing l hut but ut the Instead of oC being pumped II directly through the colls coils Is ii forced under pressure of or air at lit ZOO to pounds per square Inch lrich Irons from a n yes ves s sI wl I Hi lit et the drivers side aIde Time The air pres pressure ires sure lIure Is h kept up by Intermittently work workIng Ing mit In a n pump geared to one of or the tha en engines gines No pressure remains In the bolter belier when ashen the car Is stopped but ut the PIUrO In the r serves to start thus tho car without pumping In water by b hand ns na In ho other flash boll boil boiler bollore er ore ers The new electric furnace of ot Prof J S Joly Joiy consists of ot A it fireclay crucible In Irs whoso whose wall U is embedded a spirally around wire through a n current Is ii I passed Very high tern tem up to tho the softening of ot the clay nr at obtainable and end the furnace Is b valuable blo where hero It Is ii l required to pro prolong prolong prolong long such urh high temperatures t with J much accuracy of or control and freedom from house are arc made mado to take their own on pictures by the tho Ingenious apparatus ot of Mr Ir O 0 0 Pike nn On English 1 photograph photographer er cr A bait of ot fat tat Is placed on nn un elec electrical electrical who which Is hi h BO so connected with witha a camera that when tho ho halt bait Is ro re removed moved the camera shutter hutter Is released giving an un Instantaneous exposure of oC a 1 sensitive lI plate PInto An excellent portrait of ot the song sons thrush Is among the tho Inter Interesting eating esting results that have been beems shown The may mn be he used with other timid creatures and for Cor getting pictures of oC animals tho the elec dee electrical electrical wire can cnn bo Ie made to ignite a I lit hit hittie tie magnesium ns as It releases the tho shut hut shutter ter tor a 1 strong light nt itt tho the Instant hesitant Ins of exposure Next to malaria pellagra or Italian leprosy seems accuse to lW be The Jho plague ot of the tho Italian peasantry It Is supposed to bo be caused by musty Indian corn and It Is first manifested by an appearance of inflamed patches on the tho skin which Is followed by lesions of the walls of the stomach and Intestines and then than by serious nervous disturbance and fatal abel madness In the tho province of Verona cases were certified last year near nearly ly II one per cent of the tho population be being hug ing victims with 82 of the cases In the final stage A curious observation has been made by a German bacteriologist In a study of tIns tho of a constantly used swimming bath The rho number of bacteria was tattoO found to Increase reg regularly than during the day clay after time tho bath ana newly with water and then to decrease constantly There Thoro was sas evidence thirst that the decrease could not bo ho due to the tue notion nation of light nor to sedi sedimentation edi nor td tO the lack of food The Tho conclusion reached that It re cc resulted from struggle of bacteria with each other oilier many being destroyed A new wrapping paper loper consists of two sheets glued together with a solution ol of rubber It Is water waterproof waterproof proof amid very strong The hardened condition of steel or even wrought Iron says flays Mr J 3 Muir may be ho reduced In a manner similar to tempering by straining the tho metal to toa toa a point just above Its elastic limit anal heating above degrees Cent |
