(«;» )

- «nä rt dy Chan« rhe Sifoer wiU not uke, then hold it to the Fire totake

away all manner of Grease, and it will not fail-

Memorandum ; This Method is known to very sew Goldfmitbs in Gtr-many.

t„ paint Gits in XVIII. i- Grind well upon a Störte forne Miniam for Red.

Mtrii'Cdourj i 2 RaJtx Curcuma, or ratber Cerujja Citrina for Yelltw.

Southweiu ' s z. Sntalt for Bltw.

»• k' 3 ® 4 * Verdepreasc for Green.

5. Cerujje, or Chalk, for White.

Which being all soparately wrougbt in Ost, take a Rrufli of Hog’s Hair,tHpt in any of the seid Colours, and it will, being Rowled in your Hand,Scatter the fame upon the Glass; then with your Peneii Work them toge-tber as you thinkfit; and lastly, flinga little Meade amongstthem, whichCovers all.

Imitation of XIX. S. Septalio, a Canon in Milan, hath the Sccret of making as goodcbmaDi&cy by p mt p ÜW jz raac k so c bina it felf, and Transparent.

p. U7.

Th' Chinese way XX. The Chinese G\xi\& Paper onOneside with Leas Gold, then cut it inof maifng Goid L on g pj e ces ; they rhen Weave it imo their Stlks t which makes them,H»msloar? ° r ' with little or no Gost, look very Rieh and Fine. The fame Long piecesn. 2jo. p. 71. are Twifted or Turn’d, abouc SilkTbrettd by tbetn, so Artisiciafly, asto look Finer than Gold Thrcad, tbo’ it b» of noGreat Value.

To eounurfeit XXl. I bave been two Days at Harlem on purpole to soe the ExperimentOpal; bjMr.s. of the msking of Counterfeited Opal- Glass ; h. is verylively, I confeli, andt° I *g ,r p , *74j. I gueß, performed only by the Dejrees of Heat, Producing the Colours.

3 Wben the Compofition i» throughly Mehed, they take out some on the Point

of an Iron-rod, which being Cool’d either in the Air or Water, is Colour-lesi and Ptilucid ; but being put into the Mcuth of the Furnace on the someRod, and there Turnedby thehand -foca little Space, hatb its little Bodiesso Varioufly Posited in feveral parts of the some Piece, as that the Lightfalling on them, being varioufly Modtfkd thereby, Represonts thole seve-»1 Colours that are feen in the True Opal. Whether it be the Greatest,or Least Degree of Heat, that renders it a White Opakt Body, I have letflip; but this I know, (which feeros remarkable) that the Colours ofit maybe Destroyed and Restored according to the Various Motions (1 fuppose )of its Partides by Heat.

some olfervati- XXII. Two things, I conceive, are chiefly aimed at in the Inquiry oftours^^^Dve^ 0 " ^ ours > khe one, to Encrease the Materia TtnSoria, and the other, to Fix, ifbyDr. M LdUr. pofllble, thoso Colours we either have already, or (hall hereafter Disoover,n. 70. p.1131. f or uso. As to the First, Animals and Vegetables, besides other NaturalBodies, may abundantly furnilh us ; And in both thesc kinds some Coloursare Apparent, as the Various Colours ot Flowers, and the Juices of Fruits,

&e. and