f 19^ )■ 
Metall Flow J of which there are two or three methods 
fet down, together with the manner how to cleans it. 
He defcribes the jijfay Weights with their Divifions^^ 
The Centner Weight confifts of an Hundred pound divid- 
ed downward. The Penny Weight is of twoforts^^ That 
ufed in High-Germany :, |the greateft of which isa iJfor^or 
256 fence,, the loweft an Helter or half penny.- The 
Low-Dutch Penny Weight has for the higheft aM<9!r>^, or 
288 Grains V for the loweft half a Grain.. 
Silver^Oars he tiys in fhort thus : A fmall quantity # 
the proportion of which to the Centner is known ^ is to be 
put upon a Teft> and melted with its due weight of Leadi. 
this being done, the Lead well cleanfed from its Slacks 
Or Drofs is to be aflayed upon the Copel^ on which the sil- 
ver Grain will remain , which is the true Content of the Oan 
He difcourfes how mixt Metals are to be affayed for Sil- 
ver, asalfo how Coined mony, Plate, burnt Silver &c. 
How the Silver T ouch-needles are made; How mixed witfi 
their proportion of fo^/^^r, and ufed. How silver is to be 
feparated from other Metals , and burnt dean under the 
Muffle. J way by which good Proof^Ballances are to be 
made, and fitted with all pofGble exa£tnefs, asalfo are the 
Proof * Weights the divifion of which from the hig^ejl 
to the loweji he prefers in making them * but they are 
to be proved when made , from the fmalleft to the greateji. 
The Second ^ookis oi Gold-Oars , the method the fame 
with that ofthe firft. He afTerts on.his own experience 
that no Oar hath Gold alone , without other Metals incor- 
porated 5 unlefs th^ ^aldis fenfible; and even that is not 
wholly clean , but moft commonly Silvery. 
^ ThGFair-Goldis found {landing in zWhitiJh Flinty fome- 
times in a Blerv znd Tellovo Uorn-jione, and alfo in ^ Blew 
Jhtffer-Jtreamj and Tellow Iron^ but very fmall and flamingo 
as in the Mint^tK^einlvi Bohemias xhtxt is alfo found a 
GreeniJh'Silvery-Flint ^ which after it is ground and wafhedi» 
yields a fair; high D^^f^-cWi which at the .fir ft d igging is. nor 
perceivedin the Flint. 
