[1] On 3 May 1661 Streete observed a transit of Mercury from Long Acre in London with Nicholas Mercator and Christiaan Huygens.
Astronomia Carolina was widely read, and used by students who later became very notable in their own right, e.g. Isaac Newton[4] and John Flamsteed.
[8] Street invented an improved back-staff, a modification of an earlier instrument by Robert Hooke, adding to the device two planes and a small mirror.
... "He hath left with his widowe (who lives in Warwick lane ...) an absolute piece of Trigonometrie, plain and spherical, in MS., more perfect than ever was yet donne, and more clear and demonstrated."
[12] Halley wrote an appendix to the 1710 edition of Street's Astronomia Carolina, and Cajori (op.