| Show sd EN MISCELLANY The manufacture of sulphuric acid upon which depend many and Industries is undergoing a transformation tion For nearly years it Imas been made by causing time burning sulphur or to take up more oxygen from nitrous vapor in the pres once of strain the procesa requiring an expensive plant of load chambers purl tying towers etc Ii the now being developed In time nut fumes and oxygen are being corn directly The union Is effected by means of catalysis the chemical aim tion which results from macre contact with some such substance us black itself is not changed anti does not enter into new and time in the way of up plying the principle on a large scale ale being gradually overcome depends on the regulation of the heat necessary ti about the atton Acid by catalytic methods Ii now produced h two German and time raving in cost with time greater hardly fail to have effect in the near future upon the older factories Prom an investigatIon of sixteen heat insulating substances for tir C L Norton concludes that time most Preparations arc those made of cork time next being a cover consIsting of arm inner jacket of earthy material and an outer une of wool while time Ja pure magnesIa As is only time aIr entrapped in its pores The mag covering is safe front One the cork faIrly so but wool hair anti should only be used over a mineral base The heat saved will us unity pay the cost of the covering In a year of days Time greatest reached by a Is feet on Central lor line time greatest by a rack rail railway way feet on likon The climber In the rack railway on feet the clouds which been made ridiculous by Visionaries seems to be into an important service In The PurPose however IS not time making of rain hut the of hail anti time of of is said to have been wlL such effect during three seasons that practical from damage has been secured anti hail in has been abandoned The imp is a small cannon by a trumpet which runs to tIme cloud the or of a mahi charge If black powder A gun throwing bombs with tIme fuses to time height of a mile or more now been brought forward a system of 00 stations using these gune Is being established for the protection of ho vineyards in time region of In Inthe the thus tar made it has been thought necessary to tao the not more than about a hiatt mile apart subject to hail hailstorms storms of time nettle is an Im Important experiment projected for the ettie fiber is being used In German factories for fine yarns and tissues and the products arc unsurpassed passed by those from any known teg source Nettle growing In din adapted to It is made an industry vi great promise The pilot torpedo of received a high award at the nautical congress Is designed to prevent collisions in fog at sea It Itis is drIven by a electric motor and is kept to 1600 feet of the to be pro tented being connected by two ropes carrying insulated wires IC tin ob obstacle stacle is a on the steamer is rung The rapid failure of era han been traced by a butch chemist lit one instance to the deposition on the mantles of which proved to be a of the action of on time cold iron pIpes at ordinary pressures Coating of time interior of time pipes with is a suggested rented India otters the best field for long range weather forecasts Yet the eon last June to indIcate it rainfall the normal for the months ending February 1900 the reality being the greatest drought of time century One of time most successful era of time day is ProC C V Boys I It S In a late lion lecture ho dealt happily with the surface tension of property that causes water to form In drops maken It cling to the of a afine fine sieve produces capillary attraction and for soap The meshes of it tine wIre sieve were with paraffin a of paper being then spread over the bottom Water was Into the sieve and when the paper was carefully It refused to run out being upheld by time elastIc skIn of time lower surface which caused It to cover the like a solid or it like reason be sIeve heat eel on water Time caine elastic skIn a column of water in an inverted but when the tube yas Into an atmosphere of ether the of the water skin arid tue water fell bios were strikingly manIpulated It was shown that a bubble could be hat one could be blown In Inside side another and rolled about without breaking either that one bubble could push another wIthout really touching it and that two bubbles could lie made to coalesce into one by tying them but that If one enclosed the theother other the Inner one pot be at by the small electric discharge rubber In on authority to be by no menas water proof as is shown by Its ready absorption of platen of rubber were found to be of taking up in two hours train eight to 31 per cent of vater ci 00 deg C the absorption Increasing with the degree of and a piece of the best Pars rubber kept under water of 4 was nothing but a slimy mass In two months Thin Is as a possible cause of ih deterioration of the crude gum In transportation An automatic for pockets Is cc thermostat by Iron pipe is placed In every cube ot coal anti rings a 1511 at two the tins risen ii 1 dog agaIn at Time complete disapPearance of lock lockjaw jaw the gerni of which Ia brought to cities on horse fodder is expected to follow he |
