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The earliest extant Sanskrit astrolabe
By CANDIDASA, 1605.
An unrecorded analemma
By DONN, B[enjamin], Jany. 1st, 1770.
Halley’s Comet in 1607
By HERLITZ, David, 1607
Rare volvelle from Apian’s Astronomicum Caesareum
By APIANUS, Petrus, 1540
A previously unrecorded state of a rare promotional broadside for an astronomical clock
By NAYLOR, Joseph, [c.1752].
The man as sundial
By ROSSI, Teodosio, 1590
The only known example of the only scientific instrument produced by John Seller
By SELLER, John and ALLEN, Elias, c.1640].
Time Zones
By WAGNER, Matthäus, 1687
The transit of Halley’s comet in 1758
By MARTIN, Benjamin, Feb. 24th 1757.
The only known examples of instruments made for an unpublished quarto edition of ‘Dell’Arcano del Mare’
By LUCINI, Antonio Francesco, ?c.1665].
The Gregorian Calendar
By CARRARINO, Antonio, 1582
A Time Zone Toy
By [Anonymous], after 1844].
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