Show Co coating alling iron with zinc and copper si sir humphrey davy first proposed the po covering iron or copper copped with zinc zinc I 1 with a view of or preserving it from ru rusting sting the zinc when in com combination b being ting ding more attractive to the oxygen than the iron and taking 0 it and thus preserving it untouched smail small tools ok or large ofies ones rather maybe may ie covered with zinc in var various hous fous ways wads the following nie method thodi as laid down in in chen chemical works k is the most expeditious though it is po possible sible sibie aible that if it be a cutting tool the temper may possibly be started polish polish the them iron by il bibbing 0 it with cream of tartar and afterward with ch charcoal arcoli powder this cleanses the iron and polishes it irmay it may be then washed in a solution of chloride chi chT oride of 9 of amin ammonium fiur n sal lien llen then tien dip it into a bath of melted zinc luis Itis it is then thed covered with a film of zinc and is galvanized as it is called if you wish to cover it with A a good baitin coating of copper have ready reddy at the hamd timena t bath of melted copper and plunge the iron thus covered with zinc into the copper coppee bath retaining it there until it ceases to hiss and on withdrawing it itsou ou will have it covered with copper any amy thickness 1 of bf these coatings may n a beepat bei put on by repeating the process of d dipping ap pp in in the si sol ammona bath and then in zinc and then in the copper A more simple way of light arti artl f cles cies cle cie with a thin copper capper which by the way will bof be very durable but which may be easily and cheaply repeated is the follow in i y 0 af after ter having c cleansed and polished the article as above directed place the polished metal into a solution composed of one vol voi volume tinie of acid and three of rain water in which a few d drops of a solution of sill sili sulphate phate of copper and repeat until you think the thid coating will do |