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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
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excellent Obserrarions and curious Experimenes (pear of a differene Colour from rheir Rixe and
relarine co rhis most copious Subject.
Promiscuous Observations and F. xperiments abous
Colours.
Jes obserrable, thac most transparent Bodies
Nacural ones, and several Bodies are ot a differeur
Colour nnen dissolred in a Menstruum from ivtac
ther had betore.
6. The chiesest and Moc impOrTanE Way oF aII
as being chac which doch concain many ochere
wichin ic, is by arociarins. ehe Saline Corpuscles
when cher are cither splir, dirided, or extended or any other sorr ot che niore rigid ones or chie
Po char cher have no sensible chicknels upon cheir Liquor wich the Parricles oF che Dody chac ic is
Surtaces, exhibie rarious Colours likre chole oF the
imployed ro work uxon, and by thac means must
Rainbo. Thus is ic wich Muscorr Crlals when needs alter che Fisure, Posirion, Bignels, and De
splie inro exceedins chin pieces, and sine Clals eree oF Morion oE the Componene P’arricles ot
Wvhen blonn ac che Flame oF a Lamp ineo Bubbles
as thin or chinner than ehe finest Paper; and (0
Thac Body
The Learned DC. Crem chus sumtris ux elie Re
ve see u is in chose Bubbles Which Children make Cule ot abundance ot curious Experimenes abour
out oF a mixture ot Soap and Wacer, and chole
Wxhich arise from the Makins ot almost any Chy-
che Caules OF Vecetable Colours.
2. While che Sulphur and Saline Principles ob
mical Oyl, Ox Spirit oF Wine into very sine Planes do onty swim tosether and are nor ver un:
Froch.
ced into ore Precipirare, no Colur relulis From
NP. Bople Found, chac one Grain oF Cochineal them, buc che Concenes are racher Limpid; as
dissolved hrst in a pretey quantier ot Spirir oFV).
rine, and then ehar Dissolurion dilured Wwith Wa-
cer, vould impare a sensible, chovsh bue a faint
Colour, r0 six Clases oF Warer, cach ot whichr
contained 43 Ounces and Z, which aIOUBES 10 a
bore r25000 rimes its omnveiehe: And this Mew.
che verr grear Divisibilier ot che Parrs oF Matrer
ulvalls in che Roocs and many octier parenchymoris
Parts.
2. Bur volien chey are unired, and che AIKalines
are predominane, chey produce a Creen Colour.
3. When che Sulptur and Altaline are more
equalchey mate a Fanny
4. Wtien che Sulphur, Acid, and Alkaline are
25 ell. as che Incectine Morion oF tho Parrs ot nearly equal, they produce a Tellon.
Fluid Bodies.
Dr. Hook in his Microgr. Peens to think rheri
are bur ivo Crixinal Colours, viz. Red and Blue
Which, p. 64. he defines Thus:
Red is an impression on the Retina made by an
oblique and confused Pulse of Zieht, whose strone est
Pari precedes, and its meakest follons. Bluc, an
impression made by an oblique and consused Pulse o
Lixhe, whose meakest part precedes, and its strongest
folloms. Out ot chele rivo he suppoles all orher
Colours may by mixture, (00. arile.
The mays by which à Liquor may suddent
chanec che Colour ot another LiguOr, Or oF ano
cher Body Mr. Boyle chints reducible r0 (geh 25
chele.
5. Wtien che Sulphur is predominant and che
Acid and Alkaline equal, ic makes a BIue. BUE.
6. rhen ehie Sulphur and Acid are prodoimi
nanc to che AlKaline, it produces a Purple.
7. When che Sulphur is predominane to thc AI
kaline Principte, and ihe Aeid ro them boch, it
produces a Scarlet: BuE,
8. Wten che Acid is predominane eo ihe AIIa-
line, and che Sulphur co them boch, a Blood. Red.
wohich is che hixhest and most Salphureous Colour
in NacurC. Anacom: os Plants, P, 276, 277.
Fxperiments os ehe sudien chanse os Colours.
i. Ineo a Arons Solurion oE Sublimare in com
P. By che Minure Parricles oF the Adrencirions mon Water (che Ouantiry a Spoontul or ruo
Liquors inlinvarins chemselres inco the Pores oF
drop 5 or 6 Drops ot 800d Spirir ot Vrine (Or a1.
choorher, and slling them ux either pertectiy or in moit any volatile Spirir) and che Mixrure vilt
ParE; by which means the Liphe paltins chroush prelenily appear Whire; wtich Whiceness max
ihe Liquor will be dittereney retracted trom
vohat it Was Betore, When thie POreS OF it vere
optys slled wich Rir, or pertiaps lome more sub.
tile CIuIa.
by frecins IL HOI CBIC CIS Wess Mndred ic
betore trom appearine in ies genuine and prover
Colour, as when Wacer Wastes oH che Filch oF or-
dinary Bodies, and orher Lixiriums or MenAru
immediarely be destroyed by pourins in a lierle
Bood Aqua Forris. The Tribe ot Vrinous Salis
are distinsuisted by producins chis whire Colour.
2. Drox a larse Drop ot Syrip ot Violers ori
Whire Paper, it will spread and exhibir a tolera-
ble Biue Colour; then il vou drop uxon il any
Acid Spirit or Scyeian Liquor, as luppole a drov
OF Spirit OF Vicriol, Till’immediarely curn into
a Anc Red; Whereas a drop of Spirir ot Vrine
ums cleat away, or scour oft he discoloured Rust or ary Volarile Spirir vould have curred inco 2
OF MCcaIS, 
lovely Creen; a5 al(o will a drop of ehe Solurior
S. By makins 2 comminurion OF ehe PAHS oL OE Copper in Spirit oF Vrine, thouph it BC oE
any Body, and thac cicher by really luba deep Blue ir selt. Noce, Fo make the Fxperimenr
Parricles which clune rogechier betore.
Contrary eo the last Way, che Colour ot
Bodu may be chanzed by means ot a L iguor S MZ
kins Coalicions or Apgrepares ot several Parricles
appear ehe berrer, ris best 10 Air abouc or minolé
the Liquors Wvieh che Tip of your Finger
3. Lhe FSential Oyl oF Anniseeds in cold W ea
ther coapulares and turns Whirist ver it on chis
Wrhirim Oynement. Spread on Whice Paper, you
let Fall bur a drop or cwo oF 800d Oyl oF Virriol
Which betore lay r00 scatrered and disper led 10) a Flear and Smoat will arile, and à Blood red
exhibir any Colour; and this Way ihe new Co.
axile.
Colour will be produced.
4. The Adiaphorous Spirie ot Box mineled wirt
Solurion oF Mercury in Aqua Forcis, Made Arst
2 deep Zellow, and etien in à Minure OP rO
Body by dillocaring and chansins che Sire ald Po- curried as deeply Red; and beins disested a Day
sicion ot che Pacs ot ic. Thus bruiced Fruits ap. (oc ro; let fall à notire Precipitate. MC. B0yle.
3. A
2. A Liquor may alter che Colour oF 2 Bod3
ehem, and niaking chem lels, or else by dil-join-
ins and separatins such ABprepares or Olusters oi
lours ot Precipitares may be lupposed in Pari 
5. ALiquor may also chanse the Colour oF 2