Bench Grass is a blog about the history of technology by the former student of a student of Lynn White. The main focus is a month-by-month retrospective series, covering the technology news, broadly construed, of seventy years ago, framed by fictional narrators. The author is Erik Lund, an "independent scholar" in Vancouver, British Columbia. Last post will be 24 July 2039.
Popular Posts
- Gathering the Bones, 18: Hew Down the Bridge!
- Postblogging Technology, October, I: Forest for the Trees
- The Bishop's Sea, III: The Real Presence
- Postblogging Technology, November, 1943: Caesar's New Clothes
- Postblogging Technology, November 1950, II: Platypus Time
- Postblogging Technology, December 1950, II: Christmas Corps
- Postblogging Technology, March 1944, I: Pulling In the Horns
- I Would Run Away to the Air: The British Economy, Montgolfier to 727, Part 1
- A Techno-Pastoral Appendix to Postblogging Technology, October 1950: The Chestnut Plague
- The Bishop's Sea: Fine Corinthian Leather
Wednesday, January 14, 2026
The Early Iron Age Revival of the State, XXIV: Believing Because It Is Absurd
Sunday, January 26, 2025
Postblogging Technology, October 1954, I: Brain Child in Long Pants
Shaughnessy,
Vancouver,
Canada
Dear Father:
Your Loving Daughter,
Ronnie
Sunday, December 22, 2024
Postblogging Technology, September 1954, I: A Theory of Capital Goods Might Be Just The Thing!
Shaughnessy,
Vancouver,
Canada
Dear Father:
Your Loving Daughter,
Ronnie
Wednesday, November 6, 2024
Gathering the Bones, XXXI: Raven And The First Men
This morning I am thinking about Raven the trickster, creator and king. but I also travelled on the weekend and visited my world-travelling doctor brother and his wife, who in conversation chanced to mention how much better the Pacific Northwest art held at the British Museum is than that shown here in its homeland.
"Raven and the First Men" is a Haida creation myth, here truncated. The second image is a rattle, used in shaman and healing dances. The specific meaning belongs to the owner who commissioned it, but the general theme is the transfer of power, which is another way to understand the creation myth. Deprived of its context by the decision to sell it to an outsider, it remains an eerie symbol of the relationship between Raven and one man, no doubt privileged. I would be stretching nonexistent wings in a ludicrous play at exegesis to go any further (Raven would approve!), but we can reasonably ask how it was made around here.
Sunday, March 12, 2023
A Technological (With Some Real Science and Hardball Politics) Appendix to Postblogging Technology, November 1952: Ivy Mike
In what I was brought up to call the "Bethe Cycle," but which now requires a whole Wikipedia article to describe the various branchings, a presumed homogenous substrate of deuterium (hydrogen atoms with an atomic mass of 2 due to being composed of one neutron and one proton), combined with two electrons, is fused, after multiple intermediate states and the production of "catalysts" of atomic weight up to oxygen, into an atomic weight 4 helium atoms plus 2 electron neutrons and 7 gamma ray photons, with 26.7 MeV free energy.
The CNO cycle occurs in stars, particularly larger ones. It requires less energy to initiate than the naked fusion of two monoatomic hydrogen atoms (in other words, protons), but is also less efficient. Proton-proton fusions dominate stellar processes in smaller stars, but occur at statistically lower rates, causing these stars to burn less hot than larger stars, where the CNO process predominates. By the late 1930s, these facts were understood in vague outline, although given the fact that the neutrino was still at this point a theoretical particle, and its fundamental properties still obscure, physical science's understanding of the process was obviously still incomplete. Note that this not a question of pure scientific curiosity. Neutrinos can, like neutrons, collide with uranium and plutonium nucleii and initiate atomic fission. This happens at a small fraction of the rate of fission events due to free neutrons in atomic explosions, but given that chain reactions are exponential processes, it is something that a responsible weapon designer might want to keep in mind. Ha ha who are we kidding.
In the IVY MIKE test explosion of 1 November, 1952, the American Atomic Energy Commission released 10.4 MT of free energy and a whole lot of radioactive fallout, plus a lot of politics. Considering that the explosion occurred three days before the 1952 Presidential Election, we might on the one hand say that the explosion occurred in a period of great political uncertainty, on the other hand note that while the media was invested in the idea of the election outcome being open, everyone expected Eisenhower to win; and on the third acknowledge that in fact the composition of the Senate was very much in question, and that while the GOP took a two seat majority in the voting, the defection of Oregon Senator Wayne Morse to sit as an independent, reduced that majority to a potential single vote, with Vice-President Nixon voting to break the tie.Saturday, December 18, 2021
A Technological Appendix to Postblogging, July and August 1951: The Avon State
Way back in the 28 July number, The Economist wrung its hands, as The Economist was wont to do, over the aero-engine problem. This is a problem that, as far as I know, no-one else has ever heard of, but which is well worth another look, once extracted from my historicised postblogging voice and given the longer perspective that history of technology has denied it. It seems especially pressing when I am preparing to postblog September. We have a new month's worth of handwringing to deal with, this time over "the inflation state," Attlee calling the election, and the annual Farnborough show. I can't help but think that the last two are linked, that one reason The Economist is banging on about airplanes so much is that the Farnborough show has turned into a very exciting demonstration that the Attlee government is doing something right. It would, as usual, blow The Economist's cover to be too down on Farnborough and planes, in general, but one can get there by a short detour if the flesh is willing.
Saturday, December 19, 2020
Postblogging Technology, September 1950, I: "This Calls for Champagne All Around"
Shaughnessy,
Vancouver, Canada
Saturday, October 31, 2020
Postblogging Technology, July 1950, II: Bug Out Boys of Company B
Saturday, July 4, 2020
The Bishops' Sea: Who Is This "Henry" Guy, Again?
Wednesday, September 20, 2017
Nimrod Was The First Of Those Who Were Mighty On the Earth: The 77mm HV, Technological Progress, And the 1940 Counterfactual
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| The Zhodani are alien humans (don't ask some more) who are very advanced and psionic and stuff; but they're assholes, for RPG balance. Anyway, they invade the Imperium with their high tech ships, which are just better on account of being higher tech level than Imperium ships. |











