Chap. XXIV.

MASONRY.

14SS

Fig. 2451. oval. Fig. 2452.

To trace the Stones forming an Arch with parallel Faces. — Fig. 2453. is the elevationof the arch, showing the forms of the voussoirs, under which is the plan of the arch

Fig. 2459.

MI

Fig. 2455.

irf 1 jV iq/ & ; i)'//' i;i2/

o '.g 1 IV

n U

2454.x

j/mf r>

ABC!! WITH PARALLEL FACES.