ibltoioBof C^^r, wKcWafforded the other colour, was of 
various Blews mid Indigo s. So that inftead of tn?a CDlours, 
here is a great variety made ufe of for the produdiou of all o- 
tliers. Thus, for infiance^tomodncQ all forts of Gr^^;?j,the fe- 
veral degrees of r^//i/B^ and ^^/^ Ble^w muH be mixed 5 but to 
compound Purples, the Smiet: and deep eIcip sltq to be the In- 
gredients, 
Nowjf the Animadverfor contend, that all the Eeds^tidTel 
lowsoi the one Liquor, or Blews and Indigos of the other^ are 
only various degrees and dilutiags of tbeiame Colour, and not 
divers colours, that is a Beggitrg of the Qiieftion : And I 
fhouldas foon grant, that the tv/o Thirds or Sixths in Mulick 
are but feveral degrees of the fame found, and. not divers 
founds* Certainly it is much better to believe our Senfes, in- 
forming us, that Red md yellow are divers colours^ and to make 
it a Philofophical ^^n?, Why the fame Licpor doth, accor- 
ding to its various thicknefs, appear of thole divers colours, 
Chan to fuppofe them to be the fame colour becaufe exhibited 
by the faqje liquor ? For, if that were a fufficient reafon, then 
Blew and TeUow muA zifo hQ the fame colour, fince they are 
both exhibited by the fame Tin(StmQo{ NepbriticliJVood.hut 
that they are.i/aWrx colours, you will raoreftilly underftand by 
the reafon, which, in my Judgmenf, is this The Tindure of 
Aloes is qualified to itmfmitmof eafily the rays indued withr^^ 
moii difficultly the rays indntd wiih moiety and' with intemedi^ 
at degrees of facility tbt rays indued with7W^rf;?^^/i;?^ Colours^Sa 
that where the liquor is very thin, it may fufRce to intercept 
moft of the violet, and yet tranfmit moflrof the other colours 5 
all which together muft compound a middle Colour, that is, a. 
fdirptyelkw. And where it is fo much thicker as alfo to inter- 
cept moftof the Blm mid Gmn^ the remaining Greeny Tellon?, 
and Red,n muft compcDund an Omige. And where the thick- 
nefs is fo great, that fearce any rays can pafs through it be- 
fides thofe indeed with J{fd^ muft appear of that colourjand 
that fo much the deeper and obfcurer, by how the liquor is 
thicker* And the fame may be underftood of the various-de*-^ 
grees of B/f jp, exhibited by the Solution of c^j:'^er, by reafon of 
its difpofition tointercept^ri^ moil eafily^ and tmilfmic ^ deep: 
Mlerv ot I/?^/ga^Coloor moffifredji- 
