Show metal Odde tica the importance ot of the rei no out lilt I 1 surface at face actions that metals generally bitas noted lu in a lecture by sir Wll llan tilden at the ariti th so scientific lenti fic products exhibition the property ot of platinum of tile combination of tx gen ras gas with hydrogen and other combustible substances sul sub stance stanceR was discovered by davy one hundred years ngo ago but ther aber metals show still stranger powers one of the most valuable Is the he pon ller possessed by nickel of 0 causing hydrogen hd roien to combine with lilt heated oil converting it into a fat that th tit is solid buon alien cold A substance sub innee re acting ling by its acre presence in chii way Is termed n 9 catalyst and catalyst tic actions are ilow turned to account on a large scalp scale in making sulphuric and nitric nelds wd rind ammonia in tile surface combination of gas in obtaining fats from whale bale oil and in a variety ai of manufacturing processes et A great field Is apen in the study of catalyst lc ic effects 1 1 |