188 ТНЕ GARDENERS, CHRONICLE AND AGRIGULRURAE ДАЛЕ. [Млксн 1, 1862, 
- ep ея — s — 
1 1 October sl f those triangles О after | the | y the meeting of two sidet 
р oa pedale vn pho ground in the same order ^ the i th and i ch is what i 
present. ye ear api 5 Mss FOU bé T gul | angle i tha, ‘polygon; | rd your еб siet. 
Lie еле ЕА polygons EAA the only differen being, that in | ground ov e poin мүт si A105 MEN an angle equi] ty 
GARDEN 'TRACERY. ones they Ц 1 5 м | the eue ed. a make the side > т 115 fathom 4 
(Contisiued from p. 164) d 4 foot, which is the length of the baro Б е in the s 
е “THE TWELFTH PRACTICE. THE SIXTEENTH Р | and do e n work from the p ints ажа 
‘Tod blong S r Parallelogram. “ То е. ату роон К; with the which fix stakes, and trace t i guy of the polygon 
* After. having measu red the length a b, ro the Ins | from one stake to pon ih which will make it терш, 
breadth 5 е of the par алата described п the “ [onim and like. that of а upon the paper. 
paper, and quot ted them, яй Suppose Ва nd 15 "athom, є ае agre ty t ays fori “ Е а охо WAY. 
trace out th hom may n, v ither that the base of the po| ygon бя n th 
extremities, as A, raise a perpendicular of 8 fathom | be determină denm n the ground, or that a fix'd point be x ‘tho grown, a о tho stako a "jon mut i" 
long, as from A to C, by t the sixth. Mi. Then fix a | giv nter must necessarily be. | the plan, lines from the r Gto he angles ares 
line of 15 rome long to the stake c, and one c тЕзт Way ОР WORKING. ' leon; - thelength hof ойо т lines, arie. 
ssp " the stake 5; and be e their extremities Suppose the li Ъ "s being equal to to it, ч 
n D, hiva a stake, and ue the lines B D and | 
the | radiu: 
ide ss доо ich dmit t fath 
о, which, аф в and a с, will form the parallelo- | а ver ird bci eaa d admit аа ^ im | supposed to Бе 20 fathom sure upon the 
gram 
plan, with tbe а [x AD. made by the 
- “Тнк FIRST ОвзЕВҮАТІ THE GROUND. THE PAPER. 
* If the ob > 
long square were much m than this: | PRACTICE THE TWELFTH. 
i e ins s 
D ГЭ 
observation on the sixth Экеу and make each 
ot hose — equal to the breadth of the 
parallelogram 
£ SECOND ER. 
* То draw a perfect square, the р th 
ien that above, send that the two perpendiculars 
base bon siis 
ust be drawn as long as the 
“THE recien PRACTICE THE THIRTEENTH. 
* То describe, with the Э ат онд Figure of t 
ides. 
* Suppose the irregular figure to bea b c d, from 
the не юш with MON bera а с, describe with the 
ап агсһ, asce; and from the point 5, with 
Te Interval b d, mako her NN ; measure 
lengths a b, which pe 3 athom, a c 9 fathom 
bdll (eos and the cords of p arches v distances 
e 10 from f to d.l 
wo sbak 
„ and taking а cord of 9 fathom fix'd to the stake A, PRACTICE THE FOURTEENTH. 
he stake E, bring 
heir ends to meet in the point o, and drive a stake 
here: do the like оп the other side, as upon. the stake B 
bringing their extremities together in the point D, and 
racing the lines A €, C D, D B, you form, with the 
base A в, the four-sided figure propo: — 
“THE FOURTEENTH PRAC 
* To draw an irregular Fi — "al Tm Sides with the A \ i (О 
: A 
“Mhe pou TM ecc here supposed to be | 
considerably bi than us foregoing ; аз the base 
fathom 0 d|| 
а. оні THE FIFTEENTH. 
that of b d 30 fathom. Measur easure, with the e protractor, 
ey aaraa re oeaan ets fall pee 
ab; suppose here the ап and . 
t of Б 100, quot upon @ 
plan, and trace the ground Vas niu 
100 mace ions, by t the second practice; then place 
the -circle upon the stake A, түше e ada | 
60 degrees, t теге sre say, equal t 
едер by the tenth practice; make "the side * © b 
20 fathom, according to the — е ges a stako at 
с: likewise M the stake в angle 
d m i I 
egrees, and se С 
stake at D, M trace the line D c from D to C, which, PRACTICE THE SIXTEENTH. 
песто D" с aand DB, and the base A в, form an 
rregular four-sided Py we AA of the po 
" etim Pie gure of in many prem: w bother Saiao 
rregular, is зз led a polygon. Regular polygons take 
their eric m the num ex d their sides, from the 
square to the рою of 12 sid 
The polygon of 5 ast is m a pentagon. 
that o 6 < hexagon. 
£0 n » m heptagon. 
ot 8 Pm » octogon. 
of 9 2 үн ап еппеадоп, 
p »" x a di on, 
m an endecagon, 
andof13  ,, à а dodecagon. 
Polygon whatsoever. 
* Suppose the regular polygon (a) to be of five sides, | meeting of two of these 
called a pentagon; draw from the u le (a) | % as a b and a с, which, amen to ә table is 45 Names of tho Po- | Number of Degrees Ue 
two lines to the extremities of its "buo Капа c vic degrees, and is ж the ойе: a tne conter. Set the —1 MEE S IS rat 
form riangle a b c. easure one of these -circle upon the ground ov e center-stake 
two lines oniy, — м it upon rud уне уме the [I kie sal gas one alter another, * "ia i bns L^ 
pon egrees, and проп each line or radius ese angles, 
e hx like that of æ be upon t Я е stake A 20 drive stakes | ee ў 190 
the eleventh practice; which done, take two there. Then draw the lines from stake to stake, and|  Heptagon.. .. 1984 
equal to ie base D E, and putting their loops over the | they form a iactus cn like vos of the plan. парное ан ыо 
stakes сапа р, bring their extremities together in tl Кертай rere 5 D" 
point ө. n shift the cords.to the stakes c and E, | «то m nth aia CE 1 Endecagon .. 147} 
а same in а dee F, and plant eos regular m аре s the proc рну n T x Dodecagon e 150 
^ ^ , to| F 
Ра Hori os sd trace the lines D @, G с, € F, and бт the figure of 12 sides, or the dodecagon, you may have acc! Désir irl к 
hon н ЕСО; SERY. . 
of a in de pn. | S es of ie polygon, and those of the center; and itis| « With respect to ordi polygons, re 
“ For traci ient for the work, to measure either one of the] make use of the methods PURA in this Й 
т tracing | апу ber polygon whatsoever, you sides of € һе polygon, or t| the line pico fom i center to | dividing them into triang es, from à pon t 
one of its angles. tak pl ke: 
