lab recording, 16.9.1981, 21.5°C, position-detection lamp (Racal with B&K 1/2" or 1/4", tape no. R81-6)

Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith