( »9« ) 
XI. To gwe Iron the Colour and TinSlure of Cop" 
per. Commnnicated by Sir Rob Southwell, 
F. R. S. 
TAke of fmall thin Copper Pieces cleaned in the Fire 
Ij.ofAjaaFcrtu §iij.which being together in a Gla(s 
the Copper in Three or Four Hours will be dilTolv'd, 
when 'tis cold you may ufe it, by walhing with a Feather 
upon your Iron, that is prefently made clean and fmooth 
and it will prefently take the Colour of Copper, when it 
cometh out with much rubbing you may renew it again, 
but if you do it twice together, the Iron will look black. 
XII. A way of Gnilding Gold upon Siher. Com- 
wmicatedby the fame. 
BEat a Ducket thin, and didblve it in Two Ounces of 
Aqua Regiaj then dip therein a clean Rag, and let 
the fame dry, and do it again and again till all the faid 
Liquor be foak'd up, then burn the (aid Rag, and with 
the Tinder thereof let Silver be rub'd, ufing therewith a 
lictle Spittle, and if by chance the Silver will not take, 
then hold it to the Fire to take away all manner of Greafe 
and it will not fail. 
MemorarMm, This Method is known to very few 
Goldfmiths in Germany. 
xiiL n 
