Show SCIENTIFIC Sc MISCEllANY Workers Worker In glass rials opticians a are warned that certain kinds ot of ria glass appear to be so 0 soluble In Iii water that moisture quickly etch etches the surface and destroys the transparency Mr Ir E B P Pond Mondy ond of Decca College East t Bengal rl reports r hiving the dul dull mal mutt ap appearance of a cut CUI wine siw and nd of 01 I ii In which water ater had ben been allowed to 10 stand all also the spotting ot of J v pel t lq 0 ter partial draining Th These eret w were all 1 due to Tl This IX cx plains plain the rapid deterioratIon of optIcal apparatus In the molt moist climate ot of In India dla dia and amid proof roof that the fault I In the kind of glass Iu used I Is furnished by the object glass ot of a 3 telescope the Inner surface of the convex lens len being badly corroded n 1 hil hue the adjacent face tace ot of the concave a Quie quite cear clear The moton motion of camphor II in water is II wel well known A German man chemist K hi has lun Ruth readily soluble 01 u uble ble substances UI as cyanide potassium 1 I ra I silver tho nitrate tel RI Ium chloride permanganate an and lurr sugar and ha has studied their tray trav ell eli in Ib dissolving b by dropping single crystals uin mercury coverd covered by at ater er em or dilute arid acid T The movements greater tr In acid bait thu 11 In water are very verr characterIstic Te Tb crystal Scat t takes a II CO comae then c change to a circular 11 path and turn rapidly on Il its al aSh The rate of moto motion varl Ith time rete te of solution I and th the surface tena ot cit the mer mercury cu cury n new method of packing Ulf used for shipments ot of butter from to Kimberley I Is recommended ro for delicate la In general rI The b bee made from six elx panes ur window glass closed d dt co at t the er edge wih with gummed 1 anti and this I Is given a covering ot of planter ot of parIs tb the whole hole being In piper Te The curious Calt fact I Is nt noted b by a French observer that nightingales devour the drones workers or of a hive without harming the An Aa Interesting discovery that has been tor forgotten for more thal than half a century WR was lately brought to nt notice by Ma Maj Oen en J Waterhouse In 11 Morse found that IIer silver lb like It hi I compound 1 Is sensitive to light and tha that a distinct image could b be formed Ul u a clean elI 1 WI yen plate by exposing to sunlight for tur t two 0 or hours blin behind a blaik bIKk tab lab tablet let with cutout characters ant anti then developing over oer vapor 01 le He obtained sImilar with copper concluding that thaI aU all substances are changed by Irh lIght kl up the In then h has tn en that th the image narl my may maybe b be after but bUI th that t whether visible or Inyl It I is clear clearly ly Iy brought out un en ml sliver b by vapor or dy solutIons th the silver aton action 01 on other ex except pt lild lead lP op 1111 tl t lt Pt 1 thus yet t ful t thul far made that thaI th the cause lt of th thuIn the uIn I be huat hn t or pressure but lUt that thai the ete effet II dUe to tn the blue blu Ind and ry rays f liht I it I Ii a reul result of I is yet to lO b be I learned amell apparently pUt pure silver It I is known ot of otten often ten Occluded oxygen Th The ft of a magnetic survey une In the 11 I of t the pol poles seems to ha have been by ex cx plo I Dr Cook uok ot of the the Belgian llan Ant artie rt pint points out thAt a 11 geu survey ury I ii Ir of tar lar less cOns although vastly llly more In the region of the poles fn the ot of tit the mal magnetic tc poles I is yet yetto to b be fixed Many year aJ ago tho north nn magnetic P 11 ie WA Was found to lo ho bl 1 ii th the of northwestern PIl part North but I its pla place e I is and I Is not now Hven 11 lees b has learned of the south louth era em magnetic pole al all that cn can b be lid being that ht a elre circle 5 mie miles aerol across could LI be drAwn on the end If of Wilkes Land with the certainty that the polo I is within It ItA it itA A novel Russian Rulan device for tor lessening damage II in collisions rn consists of au Iron Iran tube tub connected wih with the sS YI tern tem of brakes Cuts ar ate 10 so made on nn these then o tub tube that I it become broken on nn the slightest nt it of the train an this Instantly sets th the brakes brakel tn In a I a It late test ut at a trin train displaced sleepers and andon andone on one passing upon displaced d rall rails were ere promptly Ito stopped pe without damage ure In cloth loth by the aid ot of electricity is III claimed by Mr J 1 T F Van Gestel after somewhat dl failure The fabrics aT arc saturated In a bath ot of soluble metallic 1 sails I I to 10 which th the dye Is III a aIded dt ont and an electric current II is passed pUNI through them while In the bath 1 ni ensure the treatment of both lid sides alike lkc u as the I material 1 is pa passed d through The action II is not clearly un understood but It appears that a metal II lit oxide of some me kind kin is formed by the nascent oxygen liberated by th the ell and this fU AIls th the pores ot of Ih the fabric giving liviA a sun lur tan taco and at the same me time serving as aa aaa asa a mordant to Ax tb the d dye dyeA e eA A remarkable exhibition of at the web pow powers of Ihl the rl red ant 00 Oeo pulls ha has been reported by Mr E B O 0 Green ot of the Botanic hardens at pylon A breech bh having been made In a truc structure ture of leave leu on which they III at work urk the ant nt quickly drew the edges of Ihl the IVf leaves and a bout about al arm hour afterward thy they were seen to lie he passing back and forth across the gap al two white rub grubs from whose mouths issued continuous threads of Ilk silk that the ants ant Were erp using to Ir the dam damage age The fhe larva larvae had evidently In been brought from a nt fleet Ime some distance away lAck of oC proper nesting places too Ille little water ater the sparrow lIY boys colleto collectors birds on hats hat and the cat cat are among th the causes aul ot of dl tIme decrease of song birds enumerated U by D 1 Lang Langlie lie He suggests protection and encourage encouragement ment or of the birds by planting tr trees and shrubs for tor them to live 11 in putting up nesting boxes for tor breedIng In lag water for feeding and bathing and feeding In unfavorable weather Th The building material known as al uld used In for fur a mixture of chalk silicates sulphuric ard acid Il sulphate of oC etc satur tur ted wih with glue rlue and mineral ral 1101 I It combines the advantages of stone wih with those of f wood woud and on battleships It removes the dangers of DC splintering and ot of wood Lighting by phosphorescence hat has lon long been a an attractive dream Believing tt the dram dream m may b be ll beat li lied through certain SI M Dubois h has sought for lor these the mt macat suitable culture bouillon whIch must contain water sea a 11 salt and other tol and trac traces ot of trl mineral matter ater After thousands of trl trials he has baa succeeded with thel these liquid In giving a rom room the of light full tull moonlight 8 By this light from millions of living organIsms print may b be reat read the time told by a watch teb ant and a few operations ray may bl be Performed for which bleh ordinary light would hl be unsuitable M 31 Dubols expects to In increase erl crease the intensity of the light thus thu making It of much practical value Connection between Ihl the acoustics anti tbt the plaster of a room has haa been out b by bane Nussbaum To obtain at once the best results where softness ot of timbre or tone ton I color Is II required 11 as In concert halls the walls and ceiling should not b be wih with lime sand nd but wih with a of puter ot of Paris Pane tret tree fro from nd In inthe puter th the upper layers layn and smoothed The strongly elastic dl deli catt cute sura surface ot of this plastering la is sped al ally adapted for reflecting sound lound waves f and nd giving soft UmbrA timbre A ark lamp Imp hl has been made mad b by iI 1 Gustave Le nn Ron for tor producing invisible of if 8 I Am the striking kl experiments X rim performed d wit with I it hal has been the placing near it In Inn inan an n absolutely dark rom ot of a statuette coverd covered wih with ot of Ile lime and n ailo also perfectly dark about In him abut two minutes the statuette becomes up ap to enre emerge from the darkness In I a new German furnace liquid all aIr aIris I is poured upon peat and other lo Ion grade fuell fuels to aid Id combustion On evaporatIon nitrogen passe I of first leaving a gaseous a 50 11 per cent ff of orn oxygen which powerfully for this thu lre The rn gun which UI uses tin JIO explosive whatever I Is the reul result ot of many jean ear or of e experiment b by an ene British engineer Mr Jam James Judge A dile disc at the bu base or of the gun gunis I is rapidly b by a mJ electric motor and the shots ar are by ecu cen tore force from the circumference ot of the disc at t any ny rate up to 30 feet per minute and nd with lh a mussie muae feI Vf ot about 20 2000 feet pr per lond second There I Is Jo no MIl noise an and no recoil All As at present prent de designed signed the l gun tl Is Ivl teI feet high and Weighs about 00 pounds and is II but 8 oper operated tf b by two men protected by a I light b Though intended for serlee le on war Ihl It can b be adapted for tor fht Acid JI poses I by on a l light hl carriage with the addition of oil 1 engine and dynamo for electric current In addition to advantages the weapon has bal vertical ert Iral ranil range and nd 11 will lr Are rond a circle WIthout the saltpeter alpeter that Wi was ob from eaves a V In the Ihl Southern States during dunn th the wr war ot of IS 1812 I it I is b be believed lee that the or if anti of 01 the world would have haf ton changed Th Tb origin of If this fe cave salt saltpeter peter Ilter h has by Mr W I It Be Hess who finds frim numerous that the deposits not have corn m from hat bat guano a as hu has beci supposed hut but the that I they hl resulted upp f from th the evaporation of percolating wu wa wate te ter charged hae with lh nitrates from frAm the sur surface ur urtle tle face soil SImia Similar nitrate deposit are noticed under ledges of at rk rock C Au An belief t is that add adders when swallow their young t to protect them generally have I such a fet feat impossIble ad and t to settle this a careful exam of tb the aMr structure h l been Idl made by II Mr IL G Leighton lie He f D no evidence against U the truthfulness I of t tile old To Tot t the quIM lal however hOer It fo fbi lI tom to dissect a sa tie hi rOI young tbt that haib seen a to swallow alow |