This library is built in the open.
If you spot an error, have a suggestion, or just want to say hello — we’d love to hear from you.

A. The first, which was the accepted and executed one, which is declared in the present book.
B. The second, which was to carry the Spire alone with levers placed at the top.
C. The third, which wanted to balance it upon a half-wheel.
D. The fourth, which wanted to raise it with wedges only.
E. The fifth, which wanted to lower it with screws, and carry it hanging, as one says, in mid-air.
F. The sixth, which wanted to raise and lower it with a single lever in the fashion of a balance scale.
G. The seventh, which made a half-wheel, upon which he wanted to lower it tooth by tooth, like the teeth of a mill wheel.
H. The eighth, which wanted to raise, lower, and pull it by the force of screws.
A decorative rectangular ornament composed of symmetrical, repeating floral and scrollwork motifs (fleurons) arranged in two horizontal rows.