The polyhedron in the Van Loon museum inner court is placed incorrectly. Doomernik has interested the management in a correction. The numbering has gone wrong in this section. I repeat numbers as they appear, in the order they appear. 244 pages single sided computer print, glued.
Pages are loose already.
1354.2 Severino, The oldest equal hours vertical sundial . One found in the Aosta valley could very well be the oldest. 1354.3 Nordio, A sun compass. Built by the author, it will find the meridian or the declination of any wall at any time, as long as the sun is out. 1354.4 Arnaldi, Unequal hours from ancient time up to the Middle Ages.