|Pedro Nunes metrology astronomy|
- Tycho Brahe put a nonius
- on his astronomic quadrant
- to improve the accuracy
- of his stellar observations.
- The astrolab with alidade
- is an ancient instrument.
- Soon after Nunes invented the nonius,
- astrolabs became obsolete.
- Provide forty-four arcs
- along fixed positions on the alidade
- closer and closer to its pivot point
- and spanning ninety degrees.
- Divide the arcs
- into fewer and fewer divisions,
- from ninety to forty-six.
- intending a precision
- impossible to effect
- with any geometric process,
- but when the alidade aligns
- most closely to a division on any arc,
- both the arc and division give you
- the degrees from a table.
- Nonius, nonius, give me no lie.
- The nonius is ready; the table is nigh.
- Give me your nonius and I’ll tell you why.
- With your nonius I’ll tell you by and by.
- Two stars and a nonius make no constellation.
- Mark my words but not my nonius.
- Use your nonius and point me to the station.
- The man has a face but no nonius.
- Draw a circle; draw a line.
- Inscribe the star’s arc super fine.
- Onus or bonus, use your nonius.
- Where hangs the star that shines?