1and wide, is erected on a rock foundation, and is distant
thirteen feet from
the second long wall. On that upright post, and in the second transverse
wall, which has at that point a square hole two feet high and wide, is placed
a beam thirty-four feet and a palm long. Another beam, of the same length,
width, and thickness, is fixed on the same upright post and in the third
transverse wall. The heads of those two beams, where they meet, are joined
together with iron staples. In a similar manner another post is erected, at a
distance of ten feet from the first upright post in the direction of the fourth
wall, and two beams are laid upon it and into the same walls in a similar
way to those I have just now described. On these two beams and on the
fourth long wall are fixed seventeen cross-beams, forty-three feet and three
palms long, a foot wide, and three palms thick; the first of these is laid upon
the second transverse wall, the last lies along the third and fourth transverse
walls; the rest are set in the space between them. These cross-beams are
three feet apart one from the other.
the second long wall. On that upright post, and in the second transverse
wall, which has at that point a square hole two feet high and wide, is placed
a beam thirty-four feet and a palm long. Another beam, of the same length,
width, and thickness, is fixed on the same upright post and in the third
transverse wall. The heads of those two beams, where they meet, are joined
together with iron staples. In a similar manner another post is erected, at a
distance of ten feet from the first upright post in the direction of the fourth
wall, and two beams are laid upon it and into the same walls in a similar
way to those I have just now described. On these two beams and on the
fourth long wall are fixed seventeen cross-beams, forty-three feet and three
palms long, a foot wide, and three palms thick; the first of these is laid upon
the second transverse wall, the last lies along the third and fourth transverse
walls; the rest are set in the space between them. These cross-beams are
three feet apart one from the other.
In the ends of these cross-beams, facing the second long wall, are mortised
the ends of the same number of rafters reaching to those timbers which
stand upright on the second long wall, and in this manner is made the inclined
side of the hood in a similar way to the one described in Book IX. To prevent
this from falling toward the vertical wall of the hood, there are iron rods
securing it, but only a few, because the four brick chimneys which have
to be built in that space partly support it. Twelve feet back are likewise
mortised into the cross-beams, which lie upon the two longitudinal beams
and the fourth long wall, the lower ends of as many rafters, whose upper ends
are mortised into the upper ends of an equal number of similar rafters, whose
lower ends are mortised to the ends of the beams at the fourth long wall.
From the first set of rafters4 to the second set of rafters is a distance of twelve
feet, in order that a gutter may be well placed in the middle space. Between
these two are again erected two sets of rafters, the lower ends of which are like
wise mortised into the beams, which lie on the two longitudinal beams and the
fourth long wall, and are interdistant a cubit. The upper ends of the ones
fifteen feet long rest on the backs of the rafters of the first set; the ends of the
others, which are eighteen feet long, rest on the backs of the rafters of the
second set, which are longer; in this manner, in the middle of the rafters, is
a sub-structure. Upon each alternate cross-beam which is placed upon the
two longitudinal beams and the fourth long wall is erected an upright post,
and that it may be sufficiently firm it is strengthened by means of a slanting
timber. Upon these posts is laid a long beam, upon which rests one set of
middle rafters. In a similar manner the other set of middle rafters rests on a
long beam which is placed upon other posts. Besides this, two feet above
every cross-beam, which is placed on the two longitudinal beams and the
the ends of the same number of rafters reaching to those timbers which
stand upright on the second long wall, and in this manner is made the inclined
side of the hood in a similar way to the one described in Book IX. To prevent
this from falling toward the vertical wall of the hood, there are iron rods
securing it, but only a few, because the four brick chimneys which have
to be built in that space partly support it. Twelve feet back are likewise
mortised into the cross-beams, which lie upon the two longitudinal beams
and the fourth long wall, the lower ends of as many rafters, whose upper ends
are mortised into the upper ends of an equal number of similar rafters, whose
lower ends are mortised to the ends of the beams at the fourth long wall.
From the first set of rafters4 to the second set of rafters is a distance of twelve
feet, in order that a gutter may be well placed in the middle space. Between
these two are again erected two sets of rafters, the lower ends of which are like
wise mortised into the beams, which lie on the two longitudinal beams and the
fourth long wall, and are interdistant a cubit. The upper ends of the ones
fifteen feet long rest on the backs of the rafters of the first set; the ends of the
others, which are eighteen feet long, rest on the backs of the rafters of the
second set, which are longer; in this manner, in the middle of the rafters, is
a sub-structure. Upon each alternate cross-beam which is placed upon the
two longitudinal beams and the fourth long wall is erected an upright post,
and that it may be sufficiently firm it is strengthened by means of a slanting
timber. Upon these posts is laid a long beam, upon which rests one set of
middle rafters. In a similar manner the other set of middle rafters rests on a
long beam which is placed upon other posts. Besides this, two feet above
every cross-beam, which is placed on the two longitudinal beams and the
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