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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 62, page id 1677894601:0238
# Original at the GWLB: https://digitale-sammlungen.gwlb.de/resolve?id=1677894601&page=238
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62
oFSilver, or Tin, or Resulus oF antimonr, in Fusion
or amalsamed rith a very little Nercurr become white;
artrich lheurs both that the particles ot wrhice metals
trave much more superticies, and (o are Linaller, than
those oF Gold and Copper, and also that ther are (0
opake as not to sutter the particles oFCiold or C opper to
Mine chrouoh them. Nour it is scarce to be doubted,
Bue that ehe Colours ot Grold and C opper are ot the le-
cond or third order, and theretoré the particles ot vrhite
metals cannot be much bigger than is requisite eo make
them resect the Wrhite of the Ars order. The volati-
lier oF Mercury argues that thez arc noc much bigger
nor may ther De much less, least cher lose their opacitr,
aud become cither transparent as ther do iten attenua-
ced by ritrification, or br Colution in menstruums, Or
black as thes do When sround (maller, by rubbins Sil-
ver Or Tin, Or L ead, uxon other Cubstances to drar Black
FInes. The Arst and onlr Colour which erhice metals
takce by grindins their particles smaller is black, aud
theretore their rrhite ought to De that vrhich borders
upon the black Spot in the center oF the RingS OF CO-
lOurs, That is, the wrhite ot the Arst order. But il rou
prould hence sather the bigress of metallic particles,
vou must altoir for their densitr. FOr ivere Mercury
transparent, ies density is such that the sine ot inci-
dence upon it (br my computation) vould be tothe
FiIne OF itS rCFTaCtION, 25 7F t0 20, OF 7 +0 3 And
theretore the thicknels ot ies particles, that ther mar
exhibit the Pame Colours rith those ot BabBleS OFNN 2-
ter, ouont to be lels than the thicknels oF the Skin OF
those Bubbles in the prOpOrtiOn OF 3 107. Whence
its Polsible that the particles oF Nercury may De as little