- Bookcases in the library of the University of Leiden
Another device for combining desk with shelf is to be seen at Trinity Hall, Cambridge, and, as these cases were set up after 1626, we have here a curious instance of a deliberate return to ancient forms. There is evidence that there once existed below the shelf a second desk, which could be drawn in and out as required, so that a reader could stand or sit as he pleased, as you will see from the next illustration. The University of Leiden in Holland adopted a modification of this design, for there the shelf is above the desk, and readers could only stand to use the books - Desk in the library at Zutphen
One example at least of these fittings still exists, in the library attached to the church of S. Wallberg, at Zutphen in Holland. This library was built in its present position in 1555, but I suspect that some of the fittings, those namely which are more richly ornamented, were removed from an earlier library. Each of these desks is 9 feet long by 5 feet 6 inches high; and, as you will see directly, a man can sit and read at them very conveniently. - Flemish Peasants
- trebuchet
The trebuchet was another war machine used extensively during the Middle Ages. Essentially, it was a seesaw. Weights on the short arm swung the long throwing arm.