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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 806933011:0798
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Then curn the Index about backwards el vou lec
che ansle ac Cr, the nacx Cuctins 97 Dcorces, rhict
is the Ouanciey ol the Angle G AB; Mealure ch
Line AB, ic contains F2 Chains 5 Lints, wrtrich se
donn in vour Field Book.
Then remore yout Instrument rO B, eie Index
Iins upon che Diamerer, turn it abour rill rou lec
itie Angle at C, arid ehere Fasten ic; and turn the
Index backards rill vou sec the Angle at A; cher
set donn che Deorees cur on the Limb, and rhe
Measure oF che Line B C in pour Field-Book.
RCMIOVE EOC, D, F, and C, inakins vour Ob.
serrations atcer che lame manner; and mealurins
che Lenoch ot ererys Line, cherII stand thus in ch
Fiela B00k:
Place vour Instrument at the Angle A, and lay
che Index on the Diamerer chereot, movins che
ixtiole Instrumone about, eill chrouet che Siglus
vou sec the second Anzle at B, and chero Ax it:
E Jebil
125
800
Then set ux Marts, and wich pour OA Tet LO
Or Chain, it che Distane
se, catre che L
Aance becwcen the lnltrument , ana EHC LACSC
A B; Wrhich Distance lec oH agam nioh B
ux Marks aE D: T ik
and se
vise cake the Distance BC.
tveen e and che Fledge AC, and accordinsly let up
MarkS AEP. Then takie the Angle D O F, WhicH WIII
be the lame asthe Angle B A C: DO thus tot 
the rest ot the Angles, Buc Wsien IHC LIeS slC
meatured, cher muM IL MMLALICU e CHC TaHIC
Lenech wich che ourside Lines, as che Line OD,
Measured trom 510f.
7. Fotale the Plot of a Field or Wood, by observine
near every ansle, and measurins the Distance be-
tween che Martes os Observation, by tatins in
everus Line, 1o Off. sets to the Eedec.
Suppose AB CD 10 be a Wood oc Field Co Be
thus mealured.
The manner os Protractine chis, is vearty che tame
as betore.
rom eo discover wherher ehe anslos made at their se
veral Stations be eruls raten or not.
RVLF.
MultipsY 100DCZ. Dy a Handet ICIS DS L CaIL
the number of Sides or Angles in vour Plot, the
Product Mall De equal to che sum ot all ihie Angles
obserred, il rou hare eroughe crue; ochermile
nOE.
Thus, there ivere leren Angles or Sides in che
last Plor, cheretore L MultiplY. 280 by 5, the Pro-
duet is 900, Which is equalro all che Ansles rec
Koned in che inside ot thie PlOr: For the outvard
Ansles are noc included in the Rule.
6. To measure Parallet to a Fledee (when vou cannot
8o close alons the Fedse it self) and also in such a
case hon totale vour Ancles.
Suppose A B C co be a Field, and For the Buses
rou canmor come nieher chan O WO PlanE yOuE L
prmment.
es. . . . . . .
Lec Marks be ser iix in erery Angle, noc regard
ins che distance from the Tledges, lo much a5 che
Convenience For plantins che Instrument, (0 a5 vou
may sec From one MarK tO anorher. Then begIn-
nins ac Or, cakre che Ouancier ot chac Anele; and
measure the distance 1, 2. Bur betore vou Degin
ro mealure che Line, cake che OH. set to chetledee.
viz. the distance Oe; and in catins of il, vou
must make that Line d e perpendicular r0 L, 2, b7
directino che Diamerer oE vour Instrument conaeds
2. and turnine che Index eill ic lie upon 90 Degrees
wrhich chen vill poine co whar place ot che Fledge
to meature 10, 25c: Then Ter the Neature oF che
Line Oe in vour Field Book under Tirle Of set.
S0 likeise nhen rou come to 2, mealure che Line
2, 3, and che Of. sets 25. ZB: Do che likce by 2l
he tett D. ne Lines and Ansses in che Field, hor
Ante
many (derex chey BC.
lact ot 6