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# Title: Opticks: Or, A Treatise Of The Reflexions, Refractions, Inflexions and Colours Of Light (shelfmark Leibn. Marg. 193)
# Folio 63, page id 1677894601:0239
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25 the particles of some transparent and volatile Auids,
and yet retleet therrhite ol the Airst order.
Lastlr, For the production ot blacte, the corpuscles
mult be lels thon ans ot thole which exhribit ColOurS.
For at all oreater Rres there is t00 much Light reste-
ctedto constitute this Colour. But it they be suPPo-
sed a little lels than is requisite to reffect the white and
verr faint blue ot the Arst order, they willus accoraie
eo the Ath, 8th, 27th and rBth Oblervations, resseet
lo verr little 25 to appear intensr black, and vet may
Perhaps variouss retraet it to and tro rithin them-
letres (0 lons, until it happen to be Aisted and lott,
by erhich means thes rill appear black in ail positions
OE the fire rithont anr transparener. And Fromhence
mas be understood irtiy Fire, and the more subtile
distotrer Putretaction, by dividins the particles oF (ub-
itances, turnthem to black, irhy Imall quantities ot.
Black substances impart theis C olour verr Frecly and in-
tenssy co ocher substances to irhich ther are applied;
the minute particles ot these, by reason of their very
sreat number, easily orerspreadine the srols particles
OF others; Wrhy Cilass ground very claboratelr rith
Sand on a copper Plate, till it be vell polisted, maties
the Sand, tosether rith wrhatis worn oHtrom the Cilals
and Copper, become very black: Wrhy black substances
do (oonest of all others become hot in the suns Light
and burn, (erhrich etfeet may proceed partly trom the
nultitude ot refractions in a little room, and partly
trom the ealy commotion ot (0 verr (mall corpuIcles;)
and irhry blacks arc ulually a litele inclined to a bluilte
COlOUT. For that ther are (o may be seen by illumina-
Cins irhite Paper by Lishe reltected trom black (ub.
HanCCS.