Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences, fol. -
Machine transcription. Not an edition. Errors are expected: about 8% character error rate on Latin and French lines, higher on German. Mean line confidence on this page: 0.89.
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The machine reads it as
- RC
- T0 Project a lesser Cirele, nohen ils Poles are no
- the Plane os che Projection.
- P R O P. XIII.
- Al Great Circles of ihe Sphere, passins throuch ans
- Point 2, in the Diameter of the Projection, sate
- Sall have their C’entres in the Line 8F, which is
- perpendicular tothe Diameter 8 b, and their C en-
- ters will be distane fromthe Point 5, the Centre 0)
- the Cirele A C D, by the Pansent os the Ansle os
- cheir Intersection wich the Savet .
- Pet OF be the Diamerer oF such a Circle, a
- Ruter From che Poined, Wrhere chie Fye is suppoled
- to bc placed, to O, Will project the Point a; and
- Fromt d to L, will proicet che Point b: Pheretore
- a b, 25 the projected Diamerer, and consequen
- ies midale Point e, will Bethe Cenere oF chac Cir-
- cte in che Projection.
- The Demonstration sou hare univertally in
- Prop. 4.
- Or, since b7 (Prob. L.) C a, and Cb, Will Beche
- haIF Langens oF che AEHS AO, and R L, (For che
- Primitire Circle is righr to che PyC ac d:) There.
- Fore ro proicet such a Fesser Oblique Circle, vou
- necd oniy calce chehale l’angenes ot the Distance oF
- each end of theDiameter oF luch alesser Circle From
- che Point A, oppotce ro the Fre, Cupposed acd;
- and set ehem from the Centre C, and ther wrill find
- che Poines a and b, che ends of the projected Dia-
- mecex; and a b bissected, will sive he C’en
- Ere c.
- dits 311s
- st is plain from what hath been proved in PrODOSI
- tion 10, chac che Ansle oFthe Radii os any evo Cir-
- eles is equal io rhe Angle ofthe incersection oF cheir
- Peripheries.: And cheretore il it vere required 10
- draw a great Circle chro the Poine a wetrich
- Mali mate ans siren Ansle wich che Circle
- A a d.
- Set the FaHGENE OF Etat AMPIC, Trom C the CeH-
- Ter oF the Circle A a D, Found by chemakino a
- Cirele palschro chechree PointS A, a and D, and
- chac Mall End che Poinc s, ihie Cetitre oF ihe Ciccte
- required.
- COROLL ARY.
- Fence, it a Be supposed eo be the Polar Poine
- OFthe Worid projected, and it vere required thro
- iE, to project all the FTour Circles: A a L, will be
- the FTour Circle of siX, Whose Center is in s; and
- by Terrins che Tangents oF 15, 30, 45, 60, (9c.
- boch mars Erom ecorards fandh, (agreable tothe
- Radius a 5) all che ocher FTour Circles maybe de-
- scribed on the Plane ot the Projection; trom cheir
- Cencers in che Line f B.
- Which is the Foundation oE all Dyalline, Or thC
- True Projection OF che Four Circles of the Sphere On
- any siven PlanC.
- itie sie regis Oti
- R OP. XNV.
Cite
Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences, fol. - . Machine transcription, not an edition: Leibniz Legible (model FoNDUE-GD_v2_ft_Leibniz, run 74). https://leibnizlegible.com/page/806933011:0763?run=74