Clavis horologiae.
Holwell, John, 1649-16867 XE Clavis horologié&e; or, A key to the whole 686 art of arithmetical dyalling, in two parts ... .H74c  Whereunto is annexed an appendix, being The
explication of the pyramidical dyal set up in
His Majesties garden at White-Hall, 1669 ...
by Francis Hall ... By John Holwell ...
London, Printed by Will. Bonny, for Tho. How-
kins in George-Yard in Lombard-Street. MDCLXXXVI. C1686]
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