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RULES 
TO DRAW 
CHAIRS in PERSPECTIVE. 
PLATE IX. No.9.  
FIGURE the First is the profile of a Chair with its proper dimensions:
  To 
draw a Chair (fig. III.) in Perspective, you must first draw the ground 
line 
E, then draw the horizontal line F, then mark your point of sight 0, from
thence set off eight feet six inches to V, the point of distance; the height
of the 
horizontal line is always five feet six inches from the ground line : Draw
ano- 
ther line D, parallel to the ground line, for the seat of the Chair; set
off your 
dimensions at pleasure, so as to make your design look as well as possible.
  Suppose EE, one foot ten inches, the front of the Chair, then from the
point 
of sight 0 draw OE, 0E; then from the profile, (fig. I.) take one foot six
inches 
and half CC, and set it off to the right hand cc, and from thence draw two
 lines 
Vcc, till they cut the ray OE; then set off the bigness of the back of your
Chair 
nn, one foot five inches and an half; on the front of the Chair draw nn,
&c. to 
the point of sight 0; those lines cc, drawn from the point of distance V,
cut the 
visual OE; draw the lines parallel to the visual, 0nn, and where they intersect
in Onn, there the back foot will fall at the seat of the Chair. 
  The distance in the profile B, one foot nine inches and a half, set off
from E to 
bb, determines where the top of the back foot falls; the same method is taken
 for 
the bottom of the back foot.  You see one foot nine inches and three quarters
taken 
from the profile set upon the line drr; the distance m from the foot in the
profile 
is set off upon the ground line Em, which gives the cross rail: The visual
 lines 
Onn, mark'd upon the ground line E, give the breadth of the back foot at
the 
bottom; the line G, continued in g, from the corner of the Chair E up to
P, is 
one foot ten inches; from P draw a line to the point of sight, then raise
two per- 
pendiculars from bb up to P, and the line drawn from P to the point of distance
V where it intersects in q, gives the determined height of the back of 
the 
Chair, ttt gives the breadth of the banister at the bottom of the Chair,
 aa in the 
horizontal line are two points which answer to draw the top and bottom rails
of 
the Chair, as the Chairs are less behind than before. 
  Figure IV. is a front view of a Chair, and the measures set off as in the
 other 
Chair, and drawn to the same point of sight and distance. 
B     Figure