Note 17 — III
Reading edition
Among other notable exhibits there are:
1. A series of astronomical volvelles in manuscripts and printed books.
2. The printed evidence that Leonard Digges of University College was the inventor of the telescope many years before Galileo.
3. The mathematical work of Robert Recorde of All Souls' College, in which he suggested the St. Andrew's Cross as the sign of multiplication, and uses symbols +, -, =.
4. The earliest known slide-rule in a circular form, recently discovered in St. John's College.
5. The early vellum and wooden telescopes of the Orrery Collection.
6. An original Marshall microscope.
7. Early surveying instruments, including the great quadrate of Schissler.