Page [9]

THET
   AMERICAN BUILDER'S COMPANION.
                           PLATE 1.
                             FIG. I',
 Is a drawing board, and a T square; a pine board will do for common use,
which must be perfectly square on every side, the size confrmable tote
paper, which may be secured to the board by four pins, fig. 9, or by sealin
wax; the T square may be made of mahogany, or any other hard wood; the
blade may be bevelled a little on the under side, to prevent the ink from
blotting the paper.
                             FIG. 21
  Is a trammel which is a useful machine to strike ovals or ellipsis -of
any
size; a trammel is made of two pieces of wood, with a channel  vedin- the
centre, and mitred together at right angles; the rod A i al straight tI wit
wood- with 2 pins B C, which are sometmes made to slide on it, with scw
to fasten them. When the length and breadth of an ora are det
bore aholei the rod at D, then move -the pin B to half the intendedlng
ofthie oval from D, then move the pin C to half the breadth from .1> ;z
Sproeed to describe your ellipsis; thus an ovalof anydiS     A
drawn... WhEn an oval is wanted for stucco mouldings, the     a
~Aied on the rod at D, by which means a mulding of any sixe may Ad
al in one piece.
                             *IG. 3s,  -
corwdho Bn ohil maybet h drn by means ofto pi
or cod. By thX methdyou uay dr~r an ov*Isiniawt
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