Blog

I wrote this post for the Peterhouse Perne and Ward Libraries blog.  It is cross-posted from there with their kind permission. 28 May saw...

I wrote this post for the blog of the 24th International Congress of History of Science, Technology and Medicine (iCHSTM), which takes...

I’m flying to Chicago on Wednesday.  There’ll be an unusual object in my luggage (is it wise to put that kind of statement online?). ...

This week I’m back with my equatorium, trying to pin down precisely how well it models Ptolemy’s planetary theories (and, in turn,...

In my first post I described how I began making an equatorium according to the instructions in the fourteenth-century manuscript I’m...