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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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subditus tenetur Resi ad Obedientiam, ita Rex te-( Was broad. This srange Disproporrion berween
netur subdito ad Prorectionem. And in another  the Lenethand Breadthosthe coloured Spectrum
Place, Duplex est Lisamen inter Rezem C5) popu
lum, _c. Vid. 7 Rep. CalvynS Casc. = WhicH
Passages some Wwill hare EO BC AN expre(S AuThO-
thorier in Law co prove che greac Original Con
tract berween che Kins os England and che Peo
LTGTTE, is used ro sienisie Threc Thines;
F. Thac Senlation erhich ariles in us From the
Vieu oE any Luminous Object, 25 che Sun
a StaE, Or 2 C andlC.
puc him uxon sereral Thoughus; bur ac last he
Thoughe oF this Experimentum Crucis. Ilc rook
tivo Boards, and Placed one close behind che
Prism ac che Window, (o chacche Lighe passine
chroush a mall IIole purpolels made inir, mighe
FaH on anocher Board placed nearer che WV aII, a1
about r2 Foor distance From cheformer; and
havins al(0 a small FTole in ic t00, For Pome OF
the incidene Lighero pals chrough. Behind chis
Board he placed a second Prilmm, chac the RaYS
2. Lishe signisies the Cause oF that Sensation pastins chrough it and che ruo Ioles in che
in us, 25 ic is an Action or Properer existins ir
the Luminous Body.
3. By Ehis Nord some also understand che
Action oF che Medium interposed between us
and the Luminous Object; and others, that the
Train of Rays, wrhich comins Forth trom chence,
prerades the Medium betore ic can come to aF
Fect our Fyes.
Lishe is undoubredy produced by Morion;
buE Tet TIS nOc erery Notion thac will produce
LighE. The Learned DF. FT. in his MicroCraphy,
Boards, mishc be asain retracted betore ic came
toche WalI. Then he curnd che trM Prism ac
the Windon RowIr about ies Axis, (0 as 1o makre
the Screral Parrs of the Image cast on the second
Board successirely pass chroush cheFlole in it,
char (0 he mistre obserre eo what Places on the
Vall the second Priim nould retract chem. And
xhenhe larr plainlr, by the Variation of those Pla-
ces, that ihe Lighe tendins to that End os the
Imase comards which the Refraction of the first
Prism vas made, did in the second Prism susser a
P. 55. judses the Nocion thac produces Lighe Refraction considerably, the Listr tendins 10 the
Oughe ro have these Requisires: T. Thac ic be orher End. And (0 che true C ause oF che L engch
exccedine quick, litre rhe NIOriOnS OF Fermen-
tation and Pucrefaction; (as vou sec in Shining
Pickles and ROtten WVOod) 2. IE must DC a
OF thar lmase as derected to bc no ocher than
chac Lishe consists of Rays differently refransible;
Wrhich, wichour respect 1o any Difference in
Vibrative Morion, and also hare ies Vibrations cheir Incidence, evere accordins to cheir Degrees
exceedins MOrE. This he concludes From che ot Retransibilier rransmitted rovards divers
stinins oF Diamonds, Wwhen chafed or rubbed.
Parts of ihe WVall. From Whence he justly con-
A5 to the Trajection oF Lishe chroush che cluded, char Licht it sels mas an Teterocencous
Medium, ihe most frcely rhar can be, he well Mixture os disserentiy Refransible os Rays. Phi
obserres, F. Thac che Medium must be suscep-
tible and imparrible oF ehis Norion. 2. That
los. Frans. LV. 80
FTe demonstrares also, That Cince Light is al-
the Parrs oF it must be TTomoseneous. 3. Thac ars propasated in RighE LineS, iE CanNOL POL
cheir Consticution be such, thar Lighe may be sibly consist in Action onlY, (Prop. 42, 42. Lib
propasared chrongh them as soon as postible.
Tho he aNerES, thacir ic can by no means bc In-
Rantaneous; and seems ((0 lons 250) Fulls la
cistied, thar Lighe requires much che same Pime
FOr itS Prajection, a5 MIr. Romer Found it a(Ter
vards to do by che Eclipses oF Furiters Satet
lites. Sec Philos. Trans. IV. 136. P. 893.
The Incomparable NIr. IS. Nemton allos
vich orher AAronOmers, about L0 Minutes ol
an ITour For che Morion ot a Rar oF Lighetrom
che Sun eothe Farth. Princip. P. 23r.
Ise Found atto bs Plam and repeated Experi-
ments, thac the RayS OF Lighe beins in che AIE,
and passine near or chrough the Angles of any
Princip. Phil. Mathem.) 25 che Cartesans do
aRCFF.
In anocher Place oF the Tranfactions he gires
the Follovins Definitions and PropOsitiOnS.
DE FFNFFZONS.
T. Domozeneat, Similac, or Vnisorm Liehr, is
chac Whose Rars are equallr retrangible.
2. Fleteroseneal Lisht, is chat Whose RaYs are
unequallr retransible.
Noce, Fhere are buE Three ARections OF LiGhE
in erhich he obserred iis Rars 10 ditser, viz
Refransibility, Restexibility, and Colour: Anc
opacous or rransparent Body, (Tuch a5 Pieces thole Rays wrhich agree in Refransibility, aoree
ot Gold or Silver Coin, or square Pieces ot
also in the ocher cro, and cheretore may vell
chole Mecals, the Fdges oF Rnires, or oF bro- be detined Fromogeneal; especialls since Men
ken Cla(5, (9c.) are alvars bent or incurvated
corvards such Bodies, 25 if cher eere attracted
by chem; and of chese, those Rays wrhich pa(s
nearest the Fdges, are most incurvated.
And FPOI ACHCC IL WIH LOlOW, That rhe Re.
Fraction oF the Rays oF Lighr (especially ot
those wotrich Fall near the Fdges ot Bodies, is nOr
made just at che Poine oF Incidence, buc 2 licrle
betore the Rars enter inco the denser Medium.
and a liule alter ther are sorren wichin ic.
The lame Perton Found also by curtous LPC.
utuallr call chole Things Fromozeneal, wwhich are
So in all other Onalicies chat come under cheir
Knontedse; cho in ocher Oualicies thac cheir
Knomledse exrends nocro, chiere may portibly
be some Feterogenity.
3. Those Colours he calls Simple, Or TTomo-
seneal, which are exhibited by Homosenect
Licht.
4. And chole Compound or Teterogeneal,
ertich are extribiced by Hererozeneat Licht.
5. Difterent Colours he calls nor only che
rimenes made wich erisms, chat che viridy co. more eminent Species, Red, Zellow, Creen
loured Tmase transmitred chrough a FTole, in a Blew, Purple, buc all orher the minucest Cra
darkened Room, opposire ro che Sun- beams, and darions; uch aftex the Tame manner, thac nOL
alt c a rtice Wali mas tiretimeo no tené de re l outs cle more cruinent Deose in Mutets, voi