MicrocraruHia, 46, 
pemetiog thofe feveral colours they lay on their Shels or Pelads; are no- 
thie et e, but fome compofitum, made up of fomeone or more, orallof 
ur bong 
Now,whereas it may here again be ebjetted,that neither canthe Reds 
be made:out of the Yellows, added togethei,or laid on in greater or le: 
quantity, nor can the Yellows be made out of the Reds though Jaid ne- 
ver fo thins and as for the addition: of White or Black, they donothing 
but either whiten or darken the colours to which they areadded,and not 
at all make them of any other kind of colour:.asforinftance, Vermilion, 
by being temper'd with White Lead, doesnot atall grow more Yellow, 
but onely there is made a whiter kind ‘of Red. Nor does Yellow Oker, 
though laid never fo thick, produce the colour of Vermilion, nor 
it beremper'd with Black, does itat all:make aRed; nay, though it be 
‘d with White, 1r will not afford a fainter kind of Yellow, fuch as 
cabiene, butonely awhiten'd Yellow; nor will the Blues be déluted or 
deepned afterthe manner I {peak of, as Jndico will never afford fo fine a 
Blue as Vitramarine or Bife ; nor willit,temper'd with Vermilion, ever af- 
ford a Green,though each of them be never fo much temper’d with white. 
To which I anfwer, that there is a great difference between diluting a 
colour and whitening oft 3 for dé/uting a colour, istomake the colour'd 
parts more thin, fo thatthe ting d light, which is made by trajecting 
thofe ting'd:bodies, does not receive fo deep a tinGture ; but whitening 
a colour is onely an intermixing: of many clear reflections of light ' 
among the fame ting’d parts; deepning alfo, and darkming or blacking a’ 
pics cece 
a greater ¢ the lame ‘body 5 and g 
or blacki aed a aedicadesnaueeee a multitude of dark or black | 
{pots among the fame ting’d pasts, of placing the colour in a more faint 
. to the former of thefe operations,that is,diluting and 
deepning, moft of the colours us'd by the Limners and Painters are in= 
capable of, to wit, Verwiliox and Red-lead, and Oker, becaufe theting’d 
parts arefo exceeding {mal); that the moft curious Grind{tones we have, 
are not able to feparate them into parts actually divided fo fmall as the 
ting'd particles are; for looking on ‘the moft curioully ground Ver- 
milion, and Oker, and Red-lead, 1 could perceive that even thofe {mall 
corpufeles of the bodies they left were compounded of many pieces, that 
is, they feem‘d to be {mall pieces mehssowied of amultitude of lefler 
ting’d parts : each piece feeming almoft like apiece of Red Glafs,or ting’d 
/Cryftal alll flaw'ds fo that unlefs the Grieditone could actually divide 
them into fmaller pieces then thofe flaw'd particles were, which com- 
pounded that ting’d mote I could fee with my Aécrofcope,. it would be 
impoffible to. dilute the colour by grinding, which, becaufe the fineft we 
>i will notreach to:do in Wermilion or Oker; therefore they cannot at 
x Odile ed; » whofe ting’d particles are fuch:asmay be made 
fmatler, by grinding a colour, thay be diluted. . Thus feveral = the 
se M 2 ues 
