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# Title: Lexicon Technicum: Or, An Universal English Dictionary Of Arts And Sciences (shelfmarks Leibn. Marg. 71; ZEN Leibn. Marg. 71)
# Folio - , page id 806933011:0630
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1s 2dCh
ASetie R adiiS. . = MaC in  10, 00000
Is to the Distance tun 87. 3 -  1. 941O1
Soische CO sine o(che C ourse, 5, 56 15) 9.91984
Poche Ditierence os Lacicude 72. 6- 1. 86085
By Gumer s Scale. il ll. la bolis
THC FXHNEFOM S. 90 DegreeS oD MinuTes,
10 5. 56 Degrees 15 Minutes on the Line of
Sines, reaches From 87, 3 10 72. 6 on the L ine of
Numbers.
These are ithe Seven usual Cales oF Plain
Sailine, Which vou sec are all pertormed by the
IS rothe Distance A B 5F. 5 Miles -- 1. 7F18072
So is Sine olrhe Angle aF A4300 9. 8494850
And Cncethe Angle B, is equal ro the Anole
C, che Side AC, will be equal ro the Side
Knomledse oF Rectansid Trigonometry. ThC A B.
angled ones is: Bur hoverer, I hare here sin-
Plain SaLlInS. unere s pplication
bearins oH me 5. 5. W. L Sait WV. S. WV. 51. 5
Atiles to B, and chonche Llead- lana C bears S. F.
tromme: I demand my sereral Liltances 
che Head land.
FX. 5612922
F0 che DMtadce BC 39. 4 - 1. 3956761
Doctrine ot Oblique Plain Triangles, IS HOE OF
such Necessary Dse in Sailins, as chatof RighE.
Bled our some ol rhe most Dsetul Cales ot ic
25 Follos.
Oblique Friansles is reguired.
Example.
By ebc Gurictims.
Inche Frianele B A C, siven BA 5L. 5 Miles.
and allche Aneles, viz. The Arple A45 Dcorees
Angle B67 Degrees 30 Minures, and che Angle
ASiC Sine OF che Angle C 67 301. - 9,9656153
C 67 Degrees 30 Minutes; required BC and
Exampe. 1o
A Ship in che Parallel oF 46 Degrees Norch
ac B, deleries a Fead- land ac C, distant From
her 67 Miles; Me SailS P. S. F. 63 Lles 1O D.
and chenthe Head land at C Dears S. VV. byW.
trom her: Llo did che Flead land beat Hom
che Strip when Me as ac B. And ho Far IS IE
distant trom her, non MES At D .
  rese Aic d A VC
618li 23li1
1201 
edis3it1S13S oes oiiee
laidC.
Coastine aloi the Store, L
ex secit Bar est
dels 3
cleX
CExL sC
2s
90
500
233Cit C. 230759CLEF .C IOH SstB SiI
2d1i3 ui. oGoometriaal ∞0 ~3 13OCC
Erom A dean a S. S. VV. Line 45 A ~, and 2 lS Toche Sine OF the AnOle D 56 15 = 9,. 91984
IV. S. WV. Line 25 AB, and make AB = 51. 5
Mtiles; then From B, Wwich 60 Degrecs oF the
Chords, deseribe ef, wtich make equal 10 (13
Points, and drar B s.
 t cto tot 0 d3 td. 2
Tortie Sitte DE ce Atiele C 3 r . 251  19,89310
=stMB. F 51LS OL 033C
d sisivs Ed eioIt D R.I
From B ataW AA P. S. L. Line B D, wtich
Miles, Crot H C in C, and dran B C) dd: si OC
i  vousi
A
alsrus stdictur, C.
2t
make equat eo 83, and srom D wirtr60 oE rhe
Chord
deseribe ef.
1SC, dra DfC.
Wvtich matre equal eO 56
Then Crom B virk 67
dont
et CC) I LB a BM. iCl orts 0t
aoene aeD 6) Ll .0. 6.t15)
Non 56151 =] - 52026= 107 41, Wtose
Complement to 180, i5 72 19 = Angle B,
D= LOLACS, WMICk adaCa E0 L. d. La BIrCS illC
Bcacins dt C 10 be d. : Wellecty veat.
Then.