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.
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.![]() |
Nine years ago, so in 2014, some vaguely professional media people up in Nebraska decided that these six young people had something going on, and arranged some venues leading to six (I think?) videos, most with at least slightly wonky sound. No-one watched them, and teenagers grow up quickly, so I assume that these kids quit music, joined a space mission, were exposed to cosmic radiation, gained superpowers, and now fight crime. Or something.
Probably not that, actually. Anyway, point is, the Youtube algorithm proceeded to sit on these videos for eight years while all this was going on before suddenly pushing it into everyone's feeds, leading to 200,000 views and 2000 upvotes in the last year or so. This being a lot, but not, as the kids say, not a lot of a lot, it's possible that no-one involved in making these videos knows that they have been picking up views. It's algorithm archaeology! Also, it's me sharing a video that I enjoyed. (Speaking of which, I speed read through Martha Wells' Murderbot Diaries this week. Its good!)Also some more, Sidestone Press, has launched a new initiative where you can read their books for free online. Like, for example, Lorenzo Zamboni, Manuel Fernandez-Goetz, and Carola Metzner-Nebelsick, Crossing the Alps: Early Urbanism between Northern Italy and Central Europe (900--400BC (Sidestone, 2020)! It's got the latest from the Heuneburg excavations, so I'm not going to argue about the financial viability of their business model, even if I'm pretty sure that "giving stuff away for free" does not work.
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| Caroline Geoghegan |