Show AND METALS copper apt to caiso ca iso former to de ten teri crate crale it has been fiand that ullen 11 hen rub her is in cortri contact ct with iron or steel it lea lains bract any ally binchi bied for a tame i ery cry dirre ent iii vcr is 13 ila baa aviol aben ii uel ue aj l nith mth copped or brass s lis the phila dc rhia hen cengr if in a lecture beffie the tha een of 0 arts said tl it when emiil oiCa in n a lub of cojac of 0 wass mass it app appers ars in ili undergo sor son 0 chemic ii action which chii h bs ici 10 its ullin ate consision cone conNe ision into a resinous compound comp coralou ouid 11 devoid of ela blaic lic ic dr Puig bardt has point pointed pi out this deterioration ai f tile line to the iha action of oxygen ahil is ib the gibat enemy of all mods of rubber certain of the aeao coal coa tar t oils os ind and mana man oils of animal origin suh such as ai mallov oil fisl fill oil etc when into contact with nith incila india rubber seem to st up the process copper 0 ide file in conjunction I with oil off is a source ol of cullar danged to a a lit id in n the tubing formed of copper the destruct he action his has been observed Ned in n less than a N ai for these purposes therefore when the he use ue of a rubber li l i advisable I 1 it t Is esbar essam to aplis ap iv i I 1 p coating of tin of 01 some oil of tr ir i r metal on the of tile lie coppi to gua oual a against tilts this a atlon tion another rubber au thorit in om n this saas that hat the coiling coating of copped vieb I 1 tin n bercio insulating lasu lating is ihrl to guard a ainest alteno 1 tebio a ion at tl e same tuna little till to do trus truc ive tend elle enci has bi b i tunic 1 to alian tage kun it anas nece sala 10 0 o cent celt ins ing or f coppez on the he iron ae of lie tell loll that joins the mi in tal jl sn in the rubber so that it is alist impo ible to ahr hian m |