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Stephen Johnston

@StephenHSM

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

 Oxford, UK
mhs.ox.ac.uk/staff/saj/
Joined May 2011
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Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)Photo by Stephen Johnston (@StephenHSM)
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-a…
Image from Oxford Centre for Islamic Studies (@OCISOxford)
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Stephen Johnston retweeted
Alexander Boxer (@SchemeOfHeaven) profile picture
Alexander Boxer@SchemeOfHeaven7 Jul 2022
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 @StephenHSM for the suggestion! alexboxer.com/astrolabe
Image from Alexander Boxer (@SchemeOfHeaven)
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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. @StephenHSM @Seb_Falk
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We made our very first GIF, what do you all think? #needspractice mhs.ox.ac.uk/collections/imu…
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