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Jon Agar Profile picture
@jon_agar
Jun 4, 2023 • 7 tweets • 4 min read • Read on X
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White and Common (yellow) Rockrose (Helianthemum apenninum and nummularium), Purn Hill, Somerset, and, drum roll… ImageImage
… the hybrid Sulphur Rockrose (Helianthemum × sulphureum), Purn Hill, Somerset #wildflowerhour Image
Also seen on Brean Down, Somerset, compare with White Rockrose below Image
Also saw found the weird small grey umbellifera Honewort (Trinia glauca), Purn Hill, Somerset #wildflowerhour Image
Purn Hill is a wonderful botanical site (as is the much larger Brean Down), a mix of maritime and limestone influences, with views to Wales and Devon Image
Not strictly one for #wildflowerhour but the rare branched horsetail Equisetum ramosissimum was a new one for me. Masses of it by the verge of Ellenborough Park in Weston-super-Mare ImageImage
Cheddar Pink, in its classic location, Cheddar Gorge, top of the cliffs #wildflowerhour ImageImage

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More from @jon_agar

Jon Agar Profile picture
Jun 5, 2023
Over five years I’ve been reading all the SF Masterworks, about 188 books in total. Read in fairly random order, with preference for authors I’d not read before. Not a bad one amongst them, and plenty of surprises

Here’s a top twenty, in reverse order. Feel free to disagree
20) Raft, by Stephen Baxter.

Veers into YA territory, but the second best imagining of a high gravity world. You break a leg if you fall a foot. Features a black hole I think

en.m.wikipedia.org/wiki/Raft_(nov…
19) To Say Nothing of the Dog by Connie Willis

Like Jerome K Jerome. in Time! During the blitz!

Willis’ The Doomsday Book is also very good (Oxford! in Time! with plague!) and has the best writing on children in the series

en.m.wikipedia.org/wiki/To_Say_No…
Read 25 tweets
Jon Agar Profile picture
Nov 13, 2022
Why, in 2000, did Blair approve the building of an expensive synchrotron at Didcot (Harwell, near Oxford) and not Daresbury (near Manchester)?

Why the South and not in the North?

Anyone want a thread on the story, with archive docs?

I promise to be rude about Oxford profs…
Let’s start: what is it?

Synchrotrons accelerate particles (electrons) which when made to follow a constrained path produce intense, useful electromagnetic radiation (X-rays, UV, light etc)

You can use this light etc to probe molecular structures & do lots of good science
Daresbury, a UK national laboratory opened in the 1960s, located between Manchester and Liverpool in NW England, was one of the pioneers of synchrotron radiation sources.

It still had one of the best in the world (SRS) in 1990s

But it was getting on: upgrade or build a new one?
Read 18 tweets
Jon Agar Profile picture
May 31, 2022
Couldn't resist taking a peek at the second-place file in the January vote: just what was the Disaffection Act of 1934, and what had the student done? thread...
It is the case, or as the Yorkshire Evening News has it, the ‘tragedy of young Hugh Phillips’, a 18 year old student of Leeds University, sentenced for 12 months at Leeds Assizes on 9 March 1937
Phillips had sent ‘a crazy letter … full of woolly stuff about world revolution’ to an RAF airman asking him to fly a bomber to fight fascists in the Spanish Civil War. The result: 12 months, the first conviction under the still new Incitement to Disaffection - Sedition - Act
Read 20 tweets

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