Stephen Johnston (@stephenhsm) 's Twitter Profile
Stephen Johnston

@stephenhsm

Curator Emeritus at Oxford's History of Science Museum; historian of science, technology and mathematics, particularly instruments and material culture.

ID: 297589019

linkhttp://www.mhs.ox.ac.uk/staff/saj/ calendar_today12-05-2011 19:22:20

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Stephen Johnston (@stephenhsm) 's Twitter Profile Photo

How to study astrolabes? A computerized checklist to try and track down all known examples - 1973 style. Amazing achievement, and what an interface! (by Sharon Gibbs, Janice Henderson, Derek de Solla Price)

How to study astrolabes? A computerized checklist to try and track down all known examples - 1973 style. Amazing achievement, and what an interface!
(by Sharon Gibbs, Janice Henderson, Derek de Solla Price)
Alexander Boxer (@schemeofheaven) 's Twitter Profile Photo

Returning to my online #astrolabe after several years to add Regiomontanus and Alchabitius cusps. Have to remind myself how these are defined. I take Regiomontanus' Tabulæ Directionum, Prob. 14 as my guide. Should have results soon. Stephen Johnston Seb Falk

Alexander Boxer (@schemeofheaven) 's Twitter Profile Photo

New #astrolabe feature: A "presentation mode" button (small gray triangle, upper-right). This lets you access the toggle switches at the bottom of the page without having to scroll away from the astrolabe. Thank you Stephen Johnston for the suggestion! alexboxer.com/astrolabe

New #astrolabe feature: A "presentation mode" button (small gray triangle, upper-right). This lets you access the toggle switches at the bottom of the page without having to scroll away from the astrolabe. Thank you <a href="/StephenHSM/">Stephen Johnston</a> for the suggestion!
alexboxer.com/astrolabe
Oxford Centre for Islamic Studies (@ocisoxford) 's Twitter Profile Photo

We are pleased to host an Open House for University of Oxford Freshers (undergraduate-level and graduate-level students) on Saturday, 30th November. To attend, please register by noon on Friday 29th November. Registration link: oxcis.ac.uk/form/ocis-open…

We are pleased to host an Open House for University of Oxford Freshers (undergraduate-level and graduate-level students) on Saturday, 30th November.

To attend, please register by noon on Friday 29th November.  

Registration link: oxcis.ac.uk/form/ocis-open…
Stephen Johnston (@stephenhsm) 's Twitter Profile Photo

Event for the Oxford Centre for Islamic Studies and History of Science Museum exhibition "Lines of Faith: Astronomy and the Art of the Astrolabe in the Islamic World": Joumana Medlej Joumana is nuking this account soon leads a study day on Abjad numerals - Saturday 17 May. Full details at eventbrite.com/e/when-letters…